Article
Materials Science, Ceramics
E. De Bona, L. Balice, L. Cognini, M. Holzhauser, K. Popa, O. Walter, M. Cologna, D. Prieur, T. Wiss, G. Baldinozzi
Summary: Three different spark plasma sintering (SPS) treatments were applied to highly interactive, near-stoichiometric UO2.04 nanocrystalline powders. The sintering conditions for reaching 95 % theoretical density were determined in regular SPS, high pressure SPS, and two-step SPS. The goal was to minimize grain growth during densification and achieve equally dense UO2 samples of different grain sizes, followed by a final annealing treatment to reduce hyperstoichiometric samples to UO2.00.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Zi-Jian Huang, Ling-Feng Su, Liang Xu, Yang-Zhi Zhou, Wei -Ming Guo, Hua-Tay Lin
Summary: High-entropy diborides typically require high sintering temperature and pressure for densification, but here, (Hf0.2Mo0.2Ta0.2Nb0.2Ti0.2)B-2 ceramics were successfully prepared by pressureless sintering at 1800 degrees C with Ni as additives. The introduction of 10 wt% Ni significantly increased the relative density of (Hf0.2Mo0.2Ta0.2Nb0.2Ti0.2)B-2 from 66.93% to 96.17%. The formation of a liquid phase during sintering facilitated densification by enhancing wettability. The hardness of (Hf0.2Mo0.2Ta0.2Nb0.2Ti0.2)B-2 ceramics increased initially and then decreased, with the highest hardness observed in samples with 7.5 wt% Ni additives (20.44 +/- 0.99 GPa).
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
S. Cagri Ozer, Kartal Arslan, Eda Metin, Servet Turan
Summary: Different amounts of TiC particles were coated on B4C granules, forming in-situ TiB2 network structures to improve the thermoelectric performance of B4C. The maximum achieved ZT value was 8.02x10-2, approximately 120% higher than that of pure B4C. However, higher quantities of TiC addition did not effectively enhance the thermoelectric performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
P. Yu Nikitin, I. A. Zhukov, A. B. Vorozhtsov
Summary: In this work, AlMgB14-based materials were successfully obtained by spark plasma sintering from an (Al-Mg)-B powder mixture, and their microstructure and properties were investigated. Samples sintered at high temperatures exhibited high hardness, and a mechanism for the decomposition of AlMgB14 during local overheating was proposed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Damien Bregiroux, Julie Cedelle
Summary: The study found that by controlling the sintering temperature during SPS, ZnS ceramics with small grain size and almost full density could be obtained, but higher temperatures could lead to grain growth, affecting mechanical properties. Keeping the grain size below 100 nm appears to be the key to developing high-performance ZnS functional ceramics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mehdi Naghikhani, Mohammad Ardestani, Mohammad Moazami-Goudarzi
Summary: Tungsten carbide reinforced brass matrix composites were synthesized using mechanical milling and sintering methods, with spark plasma sintering showing higher density and hardness. The wear resistance of the spark plasma sintered samples was also superior, with delamination and adhesion observed as dominant wear mechanisms. The bending strength of the spark plasma sintered samples was significantly higher compared to those sintered using pressureless methods.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Rafael A. Riera, Salil Bavdekar, Matthew DeVries, Jogendar Singh, Ghatu Subhash
Summary: The mechanical properties of BAM-B4C composite materials improve with the addition of B4C, but excessive addition can lead to phase segregation and cracking, thus degrading the mechanical properties of the composite.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jie Liang, Xuetong Zhao, Shenglin Kang, Jing Guo, Zhiling Chen, Yuli Long, Qian Zeng, Jianjie Sun, Lijun Yang, Ruijin Liao, Clive A. Randall
Summary: In this work, a hybrid cold sintering/spark plasma sintering (CSP-SPS) process is demonstrated for densifying and controlling grain growth in ZnO ceramics. The CSP-SPS process achieves high densities (>98%) at lower temperatures (200-300 ℃) and exhibits mild grain coarsening.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Piotr Zbies, Pawel Rutkowski, Dariusz Kata, Radostaw Lach
Summary: This study investigates the influence of increasing the milling time on boron carbide sintering using a high-energetic rotaryvibratory mill and WC-Co balls. The content of tungsten boride phase increases with prolonged milling time, affecting the onset and end process temperature of sintering. The impact of WC contamination on boron carbide laser sintering process was also analyzed.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Ceramics
A. Allemand, C. Guerin, C. Besnard, R. Billard, Y. Le Petitcorps
Summary: The SPS process is only suitable for manufacturing small hexagonal BAS components, while the UFPS technology can successfully process larger parts with better thermal control and eliminating the thermal gradient issue.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Charles Manierea, Joseph Sambasene Diatta, Christophe Couder, Christelle Harnois, Sylvain Marinel
Summary: This study proposes a combined master sintering curve and regression method to determine all sintering model parameters. It introduces the original method of estimating the grain size curve and its impact on the densification kinetics at the final stage. The results show good agreement between the model and experimental data points.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Microscopy
K. Baranidharan, S. Thirumalai Kumaran, M. Uthayakumar, P. Parameswaran, D. Arvindha Babu
Summary: The present study focuses on the microstructural evolution of 316 stainless steel with 10 wt% of B4C samples sintered at temperatures of 800, 900, and 1000 degrees C using the Spark Plasma Sintering method. The results show that the samples sintered at 900 degrees C have a higher degree of recrystallization compared to those sintered at 800 and 1000 degrees C. This can be explained by the increase in carbon content, which reduces grain boundaries and decreases the migration rate of twin boundary generation. The experimental investigation suggests that the samples sintered at 900 degrees C have a more favorable microstructure analysis.
Editorial Material
Materials Science, Multidisciplinary
Z. Y. Tan, Z. H. Xie, X. Wu, J. W. Guo, W. Zhu
Summary: High entropy A(6)B(2)O(17) ceramics with good hardness and fracture toughness are successfully prepared by solid state reaction combined with spark plasma sintering. The fracture toughness is independent of its components, but only related to its structure, and the ceramics exhibit good high temperature thermal stability.
Article
Materials Science, Ceramics
Peng Cai, Liang Guo, Liangzhi Liu, Qingmao Zhang, Jiaming Li, Qitao Lue
Summary: This study introduces a method for preparing silica glass by pressureless spark plasma sintering (PL-SPS) and investigates the rapid sintering process and microstructure evolution. The results show that sintering temperature and dwelling time are the main factors affecting PL-SPS of silica glass, and rapid densification and defect healing occur during the process. The study demonstrates that PL-SPS can efficiently produce high-quality silica glass with reduced working time compared to traditional methods.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Rajath Alexander, T. S. R. Ch. Murthy, K. V. Ravikanth, Jyoti Prakash, Tarasankar Mahata, Srinivasa Rao Bakshi, Madangopal Krishnan, Kinshuk Dasgupta
CERAMICS INTERNATIONAL
(2018)
Article
Nuclear Science & Technology
Bhaskar Paul, K. Raju, M. Vadsola, T. S. R. C. Murthy, J. Kishor, P. Arora, P. Chakraborty, K. Singh, S. Majumdar, V. Kain
FUSION ENGINEERING AND DESIGN
(2018)
Article
Materials Science, Multidisciplinary
J. K. Sonber, T. S. R. Ch. Murthy, K. Sairam, A. Nagaraj, S. Majumdar, V. Kain
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
J. K. Sonber, K. Raju, T. S. R. Ch. Murthy, K. Sairam, A. Nagaraj, Sanjib Majumdar, Vivekanand Kain
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2018)
Article
Chemistry, Analytical
R. Acharya, Sk Wasim Raja, Sumit Chhillar, J. Gupta, J. K. Sonber, T. S. R. C. Murthy, K. Sasi Bhushan, Radhika M. Rao, S. Majumdar, P. K. Pujari
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2018)
Article
Materials Science, Multidisciplinary
K. Raju, J. K. Sonber, T. S. R. Ch. Murthy, K. Sairam, S. Majumdar, V. Kain, G. V. S. Nageswar Rao
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2018)
Article
Metallurgy & Metallurgical Engineering
Silani Sahoo, Bharat B. Jha, Tarasankar Mahata, Jyothi Sharma, Tammana S. R. Ch Murthy, Animesh Mandal
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2019)
Review
Materials Science, Multidisciplinary
Jon Binner, Matt Porter, Ben Baker, Ji Zou, Vinothini Venkatachalam, Virtudes Rubio Diaz, Andrea D'Angio, Prabhu Ramanujam, Tailin Zhang, T. S. R. C. Murthy
INTERNATIONAL MATERIALS REVIEWS
(2020)
Article
Materials Science, Multidisciplinary
Rajath Alexander, K. Ravikanth, R. D. Bedse, T. S. R. Ch Murthy, Kinshuk Dasgupta
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Bhaskar Paul, Jugal Kishor, A. Karthik, Tammana S. R. C. Murthy, Saurav Sunil, K. Singh, Sanjib Majumdar
Summary: The study investigated the friction, wear, and mechanical properties of the liquid phase sintered W-2Ni-1Fe alloy, identifying abrasive wear and tribo-chemical wear as the dominant wear mechanisms. Additionally, low strain rate sensitivity and significant strain hardening of the alloy were observed, along with the determination of hardness and elastic modulus through high resolution nanoindention mapping. The maps showed a strong correlation with the actual microstructure observed through optical and electron microscopy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Silani Sahoo, Bharat Bhusan Jha, Sisir Mantry, Sandip Kumar Nayak, Tarasankar Mahata, Jyothi Sharma, Tammana S. R. C. H. Murthy, Animesh Mandal
Summary: This article investigates the dry sliding wear response of steel composites reinforced with TiB2 particles prepared by hot consolidation. It is found that the reinforcement content is the most significant factor affecting the wear mechanism, followed by sliding velocity and normal load. The specific wear rate decreases with an increase in sliding speed and load, and the presence of hard TiB2 particles enhances the resistance to plastic deformation of the steel matrix.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Analytical
Sk Wasim Raja, Vishal Sharma, Sudeep Kumar Samanta, Raghunath Acharya, Tammana S. R. C. Murthy, Sanjib Majumdar, Pradeep Kumar Pujari
Summary: This paper presents an innovative and greener method for determining the isotopic composition of boron in boron-based ceramics. The method utilizes external Particle Induced Gamma-ray Emission (PIGE) and prompt gamma ray measurement using a HPGe detector system. The effectiveness of the method is validated through comparisons with other techniques.
ANALYTICA CHIMICA ACTA
(2022)
Article
Environmental Sciences
D. S. Arati, S. R. C. Murthy Tammana, J. K. Sonber, B. Paul, S. Majumdar, A. K. Tyagi
Summary: In this study, high purity NbB2 was synthesized by reducing Nb2O5 using B4C and C as reducing agents. The process parameters were optimized to carry out the reduction in a vacuum atmosphere. The synthesized NbB2 powder had an average particle size of 3.1 μm with low oxygen and carbon contents. The hot pressed NbB2 exhibited a high density of 93% of theoretical value, with a hardness of 27.9 GPa, an elastic modulus of 705 GPa, and a flexural strength of 339 MPa.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Materials Science, Ceramics
S. R. C. Murthy Tammana, Vinothini Venkatachalam, Ji Zou, Matthew Porter, Jon Binner
Summary: Applying SiC coatings to carbon fibre preforms can improve the fibre/matrix interface characteristics and oxidation resistance of the resulting composites. This study focuses on the chemical vapour infiltration coating of SiC onto 2.5D carbon fibre preforms and the subsequent oxidation behavior. The SiC coating demonstrated improved oxidation resistance compared to other methods, and phase identification and microstructural characterization were carried out to understand the oxidation mechanism.
Review
Materials Science, Multidisciplinary
J. K. Sonber, T. S. R. Ch Murthy, Sanjib Majumdar, Vivekanand Kain
Summary: UHTCs are a type of ceramic materials that can withstand ultra-high temperatures in oxidizing conditions, making them crucial for heat protection in future reentry vehicles. ZrB2 and HfB2 have received the most attention as potential leading edge materials due to their superior oxidation resistance compared to other borides.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2021)
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)
