Article
Materials Science, Ceramics
Jiakun Wu, Haikuo Wang, Chao Wang, Yao Tang, Zhiqiang Hou, Shun Wan, Binghe Liu, Dazhuan Wu, Bin Chen, Zhongjun Tan, Xiaoping Ouyang
Summary: Tungsten carbide (WC) with different amounts of Cubic boron nitride (cBN) were synthesized using High Pressure-High Temperature (HPHT) method. The correlation between thermodynamic condition, cBN addition, microstructure, and mechanical properties of WC-cBN composites was analyzed. It was found that the phase transition of cBN at a certain temperature had a significant impact on the hardness and fracture toughness of the materials. The well-sintered WC-cBN composites exhibited improved hardness and fracture toughness compared to pure WC samples sintered under similar high-pressure levels.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Akihiro Nino, Harunobu Takahashi, Takashi Sekine, Shigeaki Sugiyama
Summary: Binderless tungsten carbide (WC) ceramics with >2.5 mol% Si3N4 were consolidated by resistance-heated hot-pressing at temperatures ranging from 1500 to 1700 degrees C. Sintering at 1500 degrees C resulted in fine-grained microstructure, increased Young's modulus, and enhanced Vickers hardness. The addition of Si3N4 lowered the sintering temperature by 300 degrees C while maintaining mechanical properties equivalent to pure WC.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Physics, Multidisciplinary
Jingzhe Fan, Weixia Shen, Zhuangfei Zhang, Chao Fang, Yuewen Zhang, Liangchao Chen, Qianqian Wang, Biao Wan, Xiaopeng Jia
Summary: In this study, a series of B4C-TiB2 composite ceramics were prepared by doping TiH2 into B4C and sintering through SPS. The effects of sintering temperature and TiH2 content on the properties of the ceramics were investigated. Results showed that increasing TiH2 content improved the conductivity and toughness of the composite ceramics.
Article
Materials Science, Ceramics
Celia S. Chari, Bryan W. McEnerney, Richard R. Hofer, James A. Wollmershauser, Edward P. Gorzkowski, Katherine T. Faber
Summary: By carbothermal reduction of B2O3 in nitrogen, the surface of graphite can be converted to h-BN, creating a bimaterial system with insulating surface and conductive substrate. The synthesis of this layered material at high temperature and the interface between graphite and h-BN are studied to understand the chemical and mechanical adhesion of the layers. The results show that the thickest h-BN layers with the highest fracture toughness are achieved at a reaction temperature of 1700 degrees C for 18 hours.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Shuai Wang, Mingsheng Yang, Huaiqian Li, Luyao Wang, Hong Wang, Pengfei Xing, Yanxin Zhuang
Summary: In this study, boron carbide (B4C) matrix composites were improved by designing and fabricating B4C-SiC-SiB6-CeB6 composites with novel additives, achieving enhanced comprehensive properties. The addition of CeO2 played a crucial role in the microstructure and mechanical properties of the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chao Liu, Rongxin Sun, Penghui Li, Baozhong Li, Yufei Gao, Julong He, Pan Ying
Summary: We report the high-pressure and high-temperature synthesis of B6O-diamond composites with excellent mechanical properties. The carbon black nanopowders were transformed into diamond nanograins and formed high-strength B6O-diamond interfaces. The composites exhibit a hardness comparable to that of polycrystalline diamond and significantly improved fracture toughness compared to previous materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Lei Fan, Xiaowei Song, Pengfei Zhao, Shoulei Yang, Mengwen Zhang, Linan An
Summary: In this study, super strong B4C ceramic was prepared using dynamic sinter forging (DSF), with a flexural strength of 935 MPa and a hardness of 39.2 GPa. The strength is significantly higher than any previously reported values, while the hardness is one of the highest ever reported. These exceptional mechanical properties are attributed to the particle rearrangement and plastic deformation generated by the oscillatory pressure during dynamic hot forging. The findings suggest that DSF is a promising technique for producing high-performance B4C ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Magdalena Gizowska, Milena Piatek, Krzysztof Perkowski, Agnieszka Antosik
Summary: This study investigated the thermal and mechanical properties of silicon nitride ceramics reinforced by nano silicon carbide particles. The presence of carbide phase led to an increase in thermal conductivity, but a decrease in densification efficiency and overall performance. The use of hot isostatic press (HIP) for sintering was beneficial in terms of mechanical properties.
Article
Materials Science, Ceramics
Zhiqiang Hou, Haikuo Wang, Yao Tang, Chao Wang, Chao Xu, Jiakun Wu, Zhicai Zhang, Shun Wan, Hongbing Yang, Yue Qin, Xiuyu Wang, Xiaoping Ouyang
Summary: Fine-grained and pure polycrystalline boron carbide bulks were successfully fabricated using submicron-sized boron carbide powder as starting materials under high pressure (5.5 GPa) and low temperature range (1000-1400 degrees C). The well-sintered boron carbide bulk recovered at 1000 degrees C exhibited a mean grain size of 205.2 +/- 191.2 nm and a relative density of up to approximately 97%. The measured Vickers hardness and fracture toughness achieved 35.0 +/- 2.8 GPa and 4.6 +/- 0.5 MPa m(0.5), respectively. The synergistic effect between fine grain size and dislocation, as well as the interplay between amorphous grain-boundary phases and pores via grain-boundary sliding, played critical roles in improving hardness and toughness.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
M. I. Dvornik, E. A. Mikhailenko, S. V. Nikolenko
Summary: This study successfully developed a new method for producing powder from cemented carbide scrap by electrical discharge erosion, post processing, and sintering to create a submicron alloy with high hardness and fracture toughness.
Article
Materials Science, Ceramics
Jingyao Dai, Evan J. Pineda, Brett A. Bednarcyk, Jogender Singh, Namiko Yamamoto
Summary: Micromechanics modeling was used to study the effects of weak interphases and thermal residual stress on the mechanical responses and fracture behaviors of B4C-TiB2 composites. Higher TiB2 volume fractions were found to enhance micro-cracking, while variations in TiB2 particle sizes had limited effect on micro-cracking behaviors.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Iurii Bogomol, Elmira Ferkhatly, Serhii Ponomarchuk, Yaroslav Zaulychnyi, Myroslav Karpets, Ievgen Solodkyi
Summary: Directionally solidified B4C/(Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2 eutectic high-entropy ceramics were prepared by the floating zone method. The increase in solidification rate was found to enhance the hardness and fracture toughness of the ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Multidisciplinary
Yang Gao, Shengqiang Deng, Xiaoting Li, Dejian Sun, Ka Gao, Linan An
Summary: A novel oscillating sinter forging (OSF) method was used to prepare ultrafine WC-Co cemented carbides for the first time. The resulting samples showed higher hardness and fracture toughness compared to samples prepared by conventional sinter-forging (CSF) method. Microstructural analysis indicated that OSF samples had better microstructure, including higher relative density, finer grains, more uniform microstructure, more fcc-structured Co phase, and more Sigma 2 low-energy grain boundaries. The study suggests that OSF has excellent synergistic hardening and toughening effects, making it a promising technique for high-performance cemented carbides.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhi-hui Zhou, Mei Zhang, Tie-chui Yuan, Yun-bao Xu, Rui-di Li
Summary: Understanding and controlling the influence of impurity elements on the quality of boron carbide is of great importance. In this study, it was found through hot pressing sintering experiments that impurity elements can result in the formation of aggregation pores and abnormal grain growth, significantly reducing the toughness of boron carbide samples.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Engineering, Mechanical
Zhirui Wei, Wei Wang, Man Liu, Junyu Tian, Guang Xu
Summary: The high-stress and low-stress abrasive wear behaviors of carbide-free bainitic and tempered martensitic steels were compared. The results showed that the wear performance differed between the two steels, and was affected by the bainitic and martensitic structures as well as the stability of retained austenite.
Letter
Cell Biology
Denisa Bojkova, Tamara Rothenburger, Sandra Ciesek, Mark N. Wass, Martin Michaelis, Jindrich Cinatl
Article
Metallurgy & Metallurgical Engineering
Christian Berger, Johannes Poetschke, Manfred Fries, Tassilo Moritz, Alexander Michaelis
Summary: Additive Manufacturing is growing in various industries, with applications for different materials. This study introduces the use of Binder-Jetting technology to print TiCN-based cermet materials for the first time, and discusses the impact of powder morphology and composition on the printed and sintered parts.
Article
Chemistry, Multidisciplinary
Jonas Schlaier, Sahin Cangaz, Sebastian Maletti, Christian Heubner, Thomas Abendroth, Michael Schneider, Stefan Kaskel, Alexander Michaelis
Summary: This study reports a facile and scalable Cu electrodeposition process to tailor the topography of Cu current collectors for the directed formation of columnar Si anodes. By adjusting the Cu-ECD parameters, the topography of the current collectors can be controlled, resulting in a significant increase in cycling stability of the Si anodes.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Oncology
Igor Tsaur, Anita Thomas, Michelle Monecke, Marion Zugelder, Jochen Rutz, Timothy Grein, Sebastian Maxeiner, Hui Xie, Felix K. -H. Chun, Florian Rothweiler, Jindrich Cinatl, Martin Michaelis, Axel Haferkamp, Roman A. Blaheta
Summary: The natural compound amygdalin has been shown to inhibit the growth and disseminative properties of taxane-resistant prostate cancer cells. This finding is important for identifying effective treatment options for metastatic prostate cancer.
Article
Materials Science, Ceramics
Eric Schwarzer-Fischer, Eveline Zschippang, Willy Kunz, Christof Koplin, Yannick Marian Loew, Uwe Scheithauer, Alexander Michaelis
Summary: Hardness, high mechanical strength, wear and corrosion resistance are the most important properties of silicon nitride. With the increasing demand in medical applications, additive manufacturing technologies offer the possibility to create more complex silicon nitride components with additional functionalities.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Letter
Virology
Lauren J. Hayes, Hannah Uri, Denisa Bojkova, Jindrich Cinatl, Mark N. Wass, Martin Michaelis
JOURNAL OF MEDICAL VIROLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sahin Cangaz, Oliver Lohrberg, Thomas Abendroth, Christian Heubner, Florian Schmidt, Holger Althues, Susanne Doerfler, Alexander Michaelis, Stefan Kaskel
Summary: The study finds that using moderately thick copper current collectors can effectively reduce the mechanical failure caused by volumetric expansion of silicon anode materials, thereby increasing the energy density of lithium-ion batteries.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Oliver Lohrberg, Karsten Voigt, Sebastian Maletti, Henry Auer, Kristian Nikolowski, Christian Heubner, Alexander Michaelis
Summary: Zero-excess Li metal batteries (ZELMBs) have attracted much attention due to their potential to increase energy density and reduce cost. However, challenges related to non-uniform deposition of Li have limited their practical application. Promising approaches including modifications of current collector, electrolyte, and cycling protocols have been developed. These approaches improve stability but reduce energy density.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Johanna Maier, David Werner, Vinzenz Geske, Thomas Behnisch, Mathias Ahlhelm, Tassilo Moritz, Alexander Michaelis, Maik Gude
Summary: Freeze foams are cellular, ceramic structures with hierarchical pore structures that can cover a wide range of applications by tailoring their morphology and strength. The correlation between pore-forming influencing factors and resulting mechanical properties was quantified in order to manufacture foams that align with component requirements, which is an important step towards the widespread application of these promising materials. Foams with independently adjustable porosities were produced and systematically investigated, revealing different material failure characteristics.
Article
Electrochemistry
Nils Buettner, Foelke Purr, Clara Sangros Gimenez, Maria Richter, Laura Nousch, Sabrina Zellmer, Alexander Michaelis
Summary: Battery models are mathematical systems that simulate real battery cells accurately. This work presents an electrochemical and thermal model of sodium-nickel-chloride/iron-chloride battery cells. The model allows for predicting internal cell processes and has a low computational effort, making it a useful tool for battery development.
Article
Materials Science, Ceramics
Eric Schwarzer-Fischer, Uwe Scheithauer, Alexander Michaelis
Summary: Aluminum nitride (AlN) is a high-performance material used in heat sinks for various electronic applications. This study successfully developed a 3D printing process for AlN based on a commercial powder, achieving excellent thermal conductivities and densities comparable to conventionally manufactured components. The results demonstrate the potential of this technology for producing complex-shaped components with high performance.
CERAMICS-SWITZERLAND
(2023)
Article
Materials Science, Ceramics
Bing Feng, Hans-Peter Martin, Alexander Michaelis
Summary: In this study, pure B4C powders were successfully synthesized by rapid carbothermal reduction method, and the effects of heat-treating temperature and starting composition on the properties of the powders were investigated. Uniform B4C powders with an average grain size of 300 nm were synthesized under the condition of a starting powder mixture with a molar ratio of B2O3/C = 4.
CERAMICS-SWITZERLAND
(2022)
Article
Materials Science, Ceramics
Johanna Maier, Vinzenz Geske, David Werner, Thomas Behnisch, Matthias Ahlhelm, Tassilo Moritz, Alexander Michaelis, Maik Gude
Summary: Freeze foams are novel cellular structures that can be made from various materials using powder technology. The process involves complex interactions between process and material parameters, making it difficult to reproduce. By studying the foam formation process, its impacts on structure, and material parameters, tailored foam properties for specific applications can be achieved. The focus of this paper is on adjusting and tailoring the macrostructure of ceramic foams to meet specific load and application requirements.
CERAMICS-SWITZERLAND
(2022)
Review
Electrochemistry
Arnaud du Baret de Lime, Tobias Lein, Sebastian Maletti, Karoline Schmal, Sebastian Reuber, Christian Heubner, Alexander Michaelis
Summary: The rise of electric mobility has led to unprecedented demand for lithium-ion batteries. To ensure efficient production of high-quality and affordable battery cells, reasonable quality assurance criteria are needed, particularly in electrode manufacturing processes. This review highlights the importance of quantifying the electrochemical significance of defects in lithium-ion battery electrodes. It also emphasizes the need for further studies to establish knowledge-based quality assurance criteria for coating defects.
BATTERIES & SUPERCAPS
(2022)
Article
Electrochemistry
Christian Heubner, Tobias Liebmann, Christoph Laemmel, Michael Schneider, Alexander Michaelis
Summary: The use of electrodes with multiple active materials shows promising potential for improving rate performance in Li-ion batteries. Through equivalent circuit modeling and electrochemical studies, it has been revealed that blended electrodes have intrinsic properties that allow for improved rate capability, minimized voltage losses, and enhanced capacity at high loads. These findings contribute to a deeper understanding of internal dynamics and synergy effects in blended electrodes, supporting the targeted development of advantageous material combinations and electrode designs for future Li-ion batteries.
BATTERIES & SUPERCAPS
(2022)
Article
Materials Science, Multidisciplinary
Ziyan Zhao, Kaiyue Zheng, Xianghui Yu, Qian Qi, Lujie Wang, Yan Liu
Summary: In-situ TiC/Ni composites with Ta element were fabricated by reactive sintering. It was found that Ta element could reduce the oxidation rate and decrease the content of TiO2 and NiTiO3 in the oxide scale, thereby optimizing the oxidation resistance and electrical conductivity of the composites.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Kai Wang, Mingyuan Ma, Yingchun Diao, Qijun Huang, Xiangkui Zhou, Guojian Li, Qiang Wang
Summary: The relationship between the V(C, N) content and the thickness of the gradient layer in nanocrystalline cemented carbides was investigated. The introduction of V(C, N) was found to enhance the mechanical properties of these materials.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Claudio Bertalan, Steven Moseley, Leonel Pereira, Ralph Useldinger
Summary: The influence of sintering temperature, dwelling time at maximum temperature and carbon content on the microstructure and mechanical and magnetic properties of WC-6%Co hardmetal was investigated. Results showed that to maximize hardness and transverse rupture strength (TRS), sintering should be performed at a low temperature (< 1400°C) and with a dwelling time of at least 75 minutes. This is particularly important for low carbon parts to ensure the necessary microstructure homogeneity required for high TRS.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Longlong Sun, Hang Li, Ningxin Wei, Jianliang Li, Jiewen Huang, Jian Kong, Qiujie Wu, Yan Shi, Dangsheng Xiong
Summary: By regulating the microstructure of TaBx films deposited by magnetron sputtering, the hardness and wear resistance of the films can be improved. With the increase of the bias voltage, the B content decreases and the crystallinity is enhanced. The microstructure of the films transforms from fibrous to dense columnar and then to granular structure. At a bias voltage of -180 V, the films exhibit super high hardness and relatively moderate fracture toughness.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Liang Xia, Kai Liu, Yucheng Cao, Chao Jiang
Summary: This study investigates the microstructure information and mechanical behavior of ion-irradiated zirconium alloys through experimental measurements and theoretical analysis. Experimental procedures involve Au3+ irradiation of specific alloys, and transmission electron microscopy analysis reveals the formation of precipitates and their transformation after ion-irradiation. Macroscopic mechanical properties are characterized by nano-indentation tests, revealing significant indentation size effect and irradiation hardening behavior. A mechanistic model is developed to explain the depth-dependent hardness observed in ion-irradiated zirconium alloys.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Jiangtao Zhang, Guoqin Huang, Yangli Xu, Jianyu Wang, Guangyao Han, Yuanqiang Tan
Summary: Selective laser melting (SLM) provides a novel method for the integrated production of structural and functional metal-matrix diamond composites in the field of diamond tools. In this study, a discrete element method model is developed to simulate the spreading process of diamond/CuSn composite powders. The findings reveal that adjusting the physical properties of diamond particles and process parameters can improve the powder bed quality and particle dynamics, leading to better performance of diamond tools.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Roman Gabor, Ladislav Cvrcek, Karel Masek, Josef Hlinka, Oldrich Motyka, Jan Walter, Grazyna Simha Martynkova, Gabriela Mikeskova, Jana Seidlerova
Summary: This study investigated the surface modification of β-Ti39Nb alloy using micro-arc oxidation technique, and examined the relationships between surface chemical composition, morphology, and tribological and corrosion properties. The results showed that the technique improved the wear resistance of the alloy, and the particle analysis confirmed the correlation between particle composition and tribological parameters.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Benedetto Bozzini, Matteo Amati, Luca Gregoratti, Majid Kazemian, Francesco Tavola, Sandra Tedeschi, Gian Pietro De Gaudenzi
Summary: In this study, the composition and chemical state of the surface of hardmetal subjected to controlled electrochemical corrosion were analyzed using synchrotron-based scanning photoelectron microscopy and photoelectron microspectroscopy. The results showed that corrosion under different conditions led to surface enrichment and leaching of different chemical elements and species.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
B. Roebuck, M. G. Gee, K. P. Mingard, H. G. Jones, H. Zhang, V. Tong
Summary: Metrology provides scientific support for the practical use of testing standards and helps establish a common language for different users regarding material capabilities. The hardmetal industry already has numerous international standards, but there is still room for improvement in certain testing strategies. The Materials Group at the National Physical Laboratory in the UK focuses on metrology and has highlighted specific metrological issues that need further attention. These include high hardness measurements, dislocation analysis, micro-tribology, nanoindentation, and structural characterization.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Suyeon Kim, Taehyun Kwon, Seulgi Kim, Sung Ho Song, Dongju Lee
Summary: This study examines the effect of two different methods, oxide reduction and mechanical alloying, on the sintering behavior and microstructure of molybdenum-tungsten sintered compacts. The sintered compacts produced with oxide-reduced nanopowders exhibit higher density, purity, and a finer microstructure, making them more suitable for sputtering targets.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
A. M. Ferro Rocha, A. M. Santos, R. Mineiro, P. Pereira, J. Sacramento, A. M. R. Senos, A. C. Bastos
Summary: This study compares the corrosion resistance of different hardmetal composites and their binders in a corrosive environment. Through electrochemical testing methods, the corrosion behavior of these materials was studied, and the influence of the binder's electrochemical behavior on the corrosion resistance of hardmetal was explored.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bo Li, Yong Zheng, Wangwang Wang, Hao Wu, Yufan Li, Jin Lv
Summary: The effects of various Cr doping amounts on the microstructure and properties of Mo2FeB2-based cermets were investigated using EDS, SEM, and TEM. The results showed that moderate Cr doping enhanced the system's wettability, fracture toughness, and transverse rupture strength, while excessive Cr addition decreased mechanical properties. The solid-solution of Cr in the hard phase had the most pronounced effect on the mechanical properties of the cermets.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Min Lian, Fei Wang, Kaixuan Rong, Xiaoci Ma, Hetian Liu, Xinmiao Gai, Yufei Ge, Shushan Dong, Qiang Tao, Pinwen Zhu
Summary: This study successfully optimized the toughness of polycrystalline diamond (PCD) by adjusting the intergranular fracture (IF) and transgranular fracture (TF) modes. The results showed that a mixture of the IF and TF modes resulted in higher hardness and toughness in PCD compared to a single fracture mode. The toughness of the PCD was approximately three times that of single-crystal diamonds and comparable to that of pure nanotwinned diamonds. The mixed modes introduced toughening mechanisms such as high frequency large crack deflection, crack bridging, pull-out, and crack branching, which increased the toughness of the PCD.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ruifang Wang, Xiang Zhan, Yongqiang Chen, Chao Zhang, Yusi Che, Jilin He
Summary: The particle size and morphology of tungsten powders play a crucial role in determining the processing properties of tungsten products. This study investigated the effects of water vapor partial pressure on the hydrogen reduction of tungsten oxides, and proposed a method of changing the particle size of tungsten powders using bottom blowing hydrogen. The experimental results showed that bottom-blowing hydrogen could improve the uniformity of tungsten powders in a crucible by eliminating discrepancies in water vapor partial pressure. The partial pressure of water vapor increased with the temperature of the water bath, leading to an increase in the average particle size of tungsten powders.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oladapo Eso, Xu Wang, Samuel Wolf, Travis Puzz
Summary: In recent decades, there has been an increasing trend in incorporating alloying additives into WC-Co hardmetals for property enhancement. This paper establishes correlations between properties and microstructure of binder modified WC-Co compositions, and explains the observed property correlations.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
