Article
Materials Science, Multidisciplinary
Xueqi Wang, Jianbo Tu, Wenhao Dai, Pinwen Zhu, Qiang Tao, Fulong Ning, Baochang Liu
Summary: In this study, fine-grained polycrystalline diamond compacts (PDC) doped with 0.5 wt% nano-vanadium carbide (VC) were sintered under high pressure and high temperature. The addition of VC improved the hardness, impact resistance, and wear resistance of the PDC samples. This improvement can be attributed to the occupation of cobalt space by the harder material VC, the reduction of cobalt and eta-phase Co3W3C content, and the refinement and dispersion of tungsten carbide (WC) grains.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Ceramics
Wenhao Dai, Shuai Zhang, Jianbo Tu, Xueqi Wang, Chuang Zhao, Baochang Liu
Summary: This study investigated the effect of grain size on wear behavior while cutting dense granite using polycrystalline diamond compact (PDC) with different grain sizes. The results showed that coarse grade PDC had higher impact resistance and fracture toughness, while fine grade PDC had higher cobalt content, hardness and thermal resistance. The wear resistance changed in the same way as thermal expansion properties, indicating a strong correlation. Thermal mismatch-induced crack network and peeling/fracture of metallic phases and diamond played critical roles in the wear of coarse grade PDC.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhaoran Chen, Dejiang Ma, Shanmin Wang, Pinwen Zhu, Qiang Tao, Baochang Liu
Summary: The TDBN-TiCN series PDC, made with Ti-coated diamond and cBN with TiCN binder, exhibited improved heat resistance, wear resistance, and impact toughness. It formed a metal-ceramic binder system under high temperature and pressure conditions, enhancing the wear resistance and impact toughness. The formation of heat resistant phases in the TDBN-TiCN series PDC contributed to an increased initial graphitization and oxidizing temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xuefeng Yang, Zhengxin Li, Fuming Deng
Summary: The addition of graphene nanosheets can improve the performance of PDC composites, with 0.2 wt% of graphene nanosheets showing the best comprehensive performance, enhancing impact toughness and increasing heat-resistant temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Energy & Fuels
Zhao-Sheng Ji, Jin-Bao Jiang, Huai-Zhong Shi, Bang-Min Li
Summary: Percussive drilling shows excellent potential for promoting the rate of penetration in drilling hard formations. The efficiency and rate of penetration of the drilling process are higher when the rock fractures in brittle mode. The rock failure mode is related to the type of rock, impact speed, and back rake angle of the cutter. Increasing the weight and speed of the falling hammer improves the rock breaking effects and efficiency.
Article
Mining & Mineral Processing
Can Cai, Pei Zhang, Daping Xu, Xianpeng Yang, Yingfang Zhou
Summary: This study utilizes a coupled smoothed particle hydrodynamics/finite element method to simulate the composite rock-breaking of high-pressure CO2 jet and PDC cutter. The mechanism of composite rock-breaking is studied from the perspectives of rock stress field, cutting force, and jet field. The results show that the composite rock-breaking can effectively relieve the influence of vibration and shock on the cutter and reduce temperature rising and thermal wear. Additionally, the effects of CO2 jet parameters on composite rock-breaking are investigated.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Zhaosheng Ji, Huaizhong Shi, Xianwei Dai, Hengyu Song, Gensheng Li, Zhonghou Shen
Summary: This study investigated the interaction between PDC cutters and rocks, revealing different failure modes and specific energy of different rock types. By establishing a numerical model and comparing with experimental results, it guided the optimization of PDC bit design and increase in rate of penetration.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Jianbo Tu, Xueqi Wang, Wenhao Dai, Haibo Zhang, Baochang Liu
Summary: This study successfully synthesized dense PDC samples doped with SiC whiskers under high pressure and high temperature conditions. The introduction of SiC whiskers improved the mechanical properties of PDC, including hardness, wear resistance, impact toughness, and thermal stability.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
R. K. Rai
Summary: This paper reports on the formation mechanism of Cr23C6 carbide and its role in the localization of plasticity and fatigue deformation. The strong elastic interaction between carbon and dislocations promotes carbon segregation and precipitation of Cr23C6 carbide. Significant dislocation density is observed around the Cr(2)3C(6) carbide, which contributes to the observed hardening behavior at 750 degrees C and a strain amplitude of 0.6%.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Xueqi Wang, Jianbo Tu, Wenhao Dai, Pinwen Zhu, Qiang Tao, Baochang Liu
Summary: In this study, a PDC material with tantalum additive was successfully prepared using high pressure and high temperature conditions. The tantalum addition was found to improve the mechanical properties and thermal stability, as evidenced by increased hardness, wear ratio, impact energy, and expansion temperature. The reinforced binder, refined WC grains, and improved sintering quality were identified as the main factors contributing to these enhancements. Further optimization of the tantalum content, mixing methodology, or sintering conditions could lead to further improvements in the PDC material.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Engineering, Mechanical
Ruyi Gou, Jingjing Chen, Xun Luo
Summary: This study investigated the tribological behavior and wear mechanism of cobalt removal polycrystalline diamond compact (PDC) under different conditions. The results showed that the addition of nano-MoS2 in PAO6 lubrication could improve friction reduction and wear resistance. The cobalt removal PDC exhibited relatively low friction coefficient and wear rate, and a smooth wear surface was observed due to the formation of a friction film through chemical reactions during the grinding process.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Energy & Fuels
Yang Li, Yi Zeng, Zhijie Chen, Luoyun Liu, Hailong Liu, Yingxin Yang
Summary: This study investigates the impact damage and service life of PDC cutters under different impact conditions. The findings suggest that non-flat cutters have longer fatigue life and are suitable for strata with significant impact stress variations.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Dongjin Kim, Chanyang Choe, Chuantong Chen, Sangmin Lee, Seung-Joon Lee, Semin Park, Seungjun Noh, Katsuaki Suganuma
Summary: This study conducted stress-controlled cyclic tension-tension tests on high-purity Cu films to understand the temperature-dependent fatigue life. The analysis showed that the grain structure changes significantly with temperature, leading to a reduced fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Mechanics
Mengdi Jia, Zhimin Wu, Rena C. Yu, Xiaoxin Zhang
Summary: Through investigating the degradation of residual fracture energy of concrete under fatigue loading, it was found that there are different rates of degradation at different stages. An increase in fatigue cycles and crack opening displacement leads to a decrease in residual fracture energy, while a decrease in fatigue load level results in an increase in residual fracture energy.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Jingjing Chen, Ruyi Gou, Xun Luo, Kunyao Li, Jinfa Zhang, Shunjun Long
Summary: This study investigated the friction and wear behavior of polycrystalline diamond compact (PDC) after leaching cobalt and the evolution of the friction film with nano-molybdenum disulfide (MoS2) lubricating additives. The results showed that the friction coefficient and wear rate of different materials and PDC after leaching cobalt were influenced by the amount and evolution behavior of the friction film formed on the sliding interface, as well as the filling effect of lubricating additives. Different materials and PDC after leaching cobalt exhibited different wear mechanisms due to dissimilar chemical reactions during the sliding process.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Mechanics
Dong Quan, Stephen Flynn, Marta Artuso, Neal Murphy, Clemence Rouge, Alojz Ivankovic
COMPOSITE STRUCTURES
(2019)
Article
Materials Science, Composites
Dong Quan, Chiara Mischo, Xiping Li, Gennaro Scarselli, Alojz Ivankovic, Neal Murphy
COMPOSITES SCIENCE AND TECHNOLOGY
(2019)
Article
Mechanics
Dong Quan, Chiara Mischo, Lucas Binsfeld, Alojz Ivankovic, Neal Murphy
COMPOSITE STRUCTURES
(2020)
Article
Engineering, Manufacturing
Dong Quan, Francesca Bologna, Gennaro Scarselli, Alojz Ivankovic, Neal Murphy
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Engineering, Multidisciplinary
Dong Quan, Brian Deegan, Lucas Binsfeld, Xiping Li, Jason Atkinson, Alojz Ivankovic, Neal Murphy
COMPOSITES PART B-ENGINEERING
(2020)
Article
Materials Science, Composites
Dong Quan, Francesca Bologna, Gennaro Scarselli, Alojz Ivankovic, Neal Murphy
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Polymer Science
Dong Quan, Peter Moloney, Declan Carolan, Hisham Abourayana, Calvin Ralph, Alojz Ivankovic, Denis Dowling, Neal Murphy
Summary: This study found that plasma treatment of short basalt fibers can enhance adhesion between the fibers and epoxy resin, leading to improved mechanical properties and fracture toughness of the composites. Synergistic toughening effects were observed when using plasma-activated BF/MWCNT hybrid modifiers, showing potential for developing strong, tough, and electrically conductive epoxy composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Dong Quan, Brian Deegan, Rene Alderliesten, Clemens Dransfeld, Neal Murphy, Alojz Ivankovic, Rinze Benedictus
MATERIALS & DESIGN
(2020)
Article
Engineering, Manufacturing
Dong Quan, Brian Deegan, Lorcan Byrne, Gennaro Scarselli, Alojz Ivankovic, Neal Murphy
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Materials Science, Composites
Dong Quan, Rene Alderliesten, Clemens Dransfeld, Ioannis Tsakoniatis, Sofia Teixeira De Freitas, Gennaro Scarselli, Neal Murphy, Alojz Ivankovic, Rinze Benedictus
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Chemical
Tatiana Stefanov, Bernard Ryan, Alojz Ivankovic, Neal Murphy
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2020)
Article
Materials Science, Composites
Gennaro Scarselli, Dong Quan, Neal Murphy, Brian Deegan, Denis Dowling, Alojz Ivankovic
Summary: This study focuses on the adhesive bonding of thermoplastic composites in aerospace applications, specifically PPS, PEEK, and PEI carbon fiber composites. Different surface treatments such as atmospheric plasma and UV radiation significantly improved the performance of PEEK and PPS joints, while PEI remained unaffected and performed well throughout.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Mechanics
Dong Quan, Neal Murphy, Alojz Ivankovi, Guoqun Zhao, Rene Alderliesten
Summary: The study demonstrates that interleaving thermoplastic veils can significantly improve the fatigue life of carbon fiber/epoxy composites, with fatigue resistance energy increasing by 143% and 190% for UD and NCF laminates, respectively. The toughening mechanisms of thermoplastic veils are influenced by various factors in the laminates.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Lorena Saitta, Vishnu Prasad, Claudio Tosto, Neal Murphy, Alojz Ivankovic, Gianluca Cicala, Gennaro Scarselli
Summary: The study focuses on composite fabrication, characterization, and recyclability of biobased polymer resins reinforced with flax fiber. By selecting different biobased resins and evaluating their mechanical properties, an epoxy resin cured with a cleavable hardener is found to have the highest glass transition temperature, ensuring full recyclability. The study also demonstrates the possibility of separating and recovering fibers and resin from composite panels through a specific chemical process.
POLYMER COMPOSITES
(2022)
Article
Mechanics
Dong Quan, Rene Alderliesten, Clemens Dransfeld, Neal Murphy, Alojz Ivankovkic, Rinze Benedictus
COMPOSITE STRUCTURES
(2020)
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)
