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Recent International Journal of Refractory Metals and Hard Materials Articles
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Effect of Zn and Ni added in W–Cu alloy on penetration performance and penetration mechanism of shaped charge liner
Ziying Zhao | Jinxu Liu | Wenqi Guo | Shukui Li | Guohui Wang
Explosive experiments of W–Cu–Zn, W–Cu–Ni and W–Cu alloy shaped charge liners (SCLs) were conducted, and the effects of Zn and Ni added in W–Cu alloy on the penetration performance and penetration mechanism...
Y. Wang | K. Lei | Y. Ruan | W. Dong
c-BN/Ni–Cr–Ti composites were fabricated by spark plasma sintering. The microstructure and the interfacial structure were analyzed by scanning electron microscopy, energy dispersive X-ray spectroscopy...
Defa Wu | Yinshui Liu | Donglin Li | Xufeng Zhao | Xiaojun Ren
Natural water is widely used as working or lubricating medium instead of the traditional oil. Hard materials have potential application to solve the abrasive wear caused by the silt suspending in natural...
Prvan Kumar Katiyar | Prince Kumar Singh | Rityuj Singh | A. lava Kumar
Cemented tungsten carbide (WC/Co) holds a successful past as abrasion and wear-resistant components in mining industries for their wonderful combination of very high hardness and good fracture toughness...
Influence of consolidation process and sintering temperature on microstructure and mechanical properties of near nano- and nano-structured WC-Co cemented carbides
Tamara Aleksandrov Fabijanić | Željko Alar | Danko Ćorić
In this paper the influence of the consolidation process and sintering temperature on the properties of near nano- and nano-structured cemented carbides was researched. Samples were consolidated from...
Microstructural characterization of diamond/CBN grains steel braze joint interface using Cu–Sn–Ti active filler alloy
S.X. Liu | B. Xiao | Z.Y. Zhang | D.Z. Duan
In order to develop the new generation superhard abrasive tools of diamond and cubic boron nitride (CBN), the brazing joint experiments of diamond/CBN crystals and AISI 1045 steel matrix using Cu–Sn–Ti...
Peng Zhou | Yingbiao Peng | Christoph Buchegger | Yong Du | Walter Lengauer
The liquid phase formation temperatures of WC–(Co,Fe,Ni) alloys with free carbon and M6C phase, respectively, were determined by means of Differential Scanning Calorimetry (DSC) analysis. Based on the...
Wear performances and mechanisms of ultrahard polycrystalline diamond composite material grinded against granite
Gang Yan | Wen Yue | Dezhong Meng | Fang Lin | Zongyi Wu | Chengbiao Wang
The wear characteristics of a novel ultrahard polycrystalline diamond (UHPCD) were verified comparing with polycrystalline diamond (PCD) through a lathe used here by grinding against granite. The wear...
Experimental study on frictional characteristics of tungsten carbide versus carbon as mechanical seals under dry and eco-friendly lubrications
S. Shankar | G. Praveenkumar | P. Krishna kumar
Lubrication reduces the friction between the interfaces of sliding surfaces in the mechanical seals that operate for extended period of time. Due to environmental issues caused by mineral oil-based...
J.M. Tarragó | J.J. Roa | E. Jiménez-Piqué | E. Keown | J. Fair | L. Llanes
In this work, WC–Co micropillars machined by focused ion beam have been tested under uniaxial compression to investigate the stress–strain behavior and associated deformation mechanisms. The results...
An investigation on the mechanochemical behavior of the Ca–C–Cu2O–WO3 quaternary system to synthesize the Cu–WC nanocomposite powder
Reza Ebrahimi-Kahrizsangi | Mohammadreza Kalani Mahabadi | Omid Torabi
Fundamental aspects of the reaction path in the Ca–C–Cu2O–WO3 quaternary system to synthesize a copper matrix nanocomposite with reinforcement particles of tungsten carbide have been studied. The mechanism...
Effect of reinforcement phase on the mechanical property of tungsten nanocomposite synthesized by spark plasma sintering
Jin-Kyu Lee | Song-Yi Kim | Ryan T. Ott | Jin-Young Kim | Jürgen Eckert | Min-Ha Lee
Nanostructured tungsten composites were fabricated by spark plasma sintering of nanostructured composite powders. The composite powders, which were synthesized by mechanical milling of tungsten and...
The development of high-strength superductile hardmetals and tools based on these materials under ultrahigh isostatic pressure
L.G. Khvostantsev | O.B. Tsiok | I.V. Ustinov | V.V. Brazhkin
This work was designed to study compressibility behavior of nanopowders of various materials under ultrahigh cold isostatic pressing (CIP) in pure hydrostatic conditions. The results indicate that creation...
Temperature dependence of microstructure evolution during hot pressing of ZrB2–30vol.% SiC composites
Behzad Nayebi | Mehdi Shahedi Asl | Mahdi Ghassemi Kakroudi | Mohammadreza Shokouhimehr
Microstructure evolutions of ZrB2–30vol.% SiC composites, prepared by hot pressing at different processing temperatures (1700, 1850 and 2000°C) for 30min under 10MPa, were investigated by optical microscopy,...
I. Sugiyama | Y. Mizumukai | T. Taniuchi | K. Okada | F. Shirase | T. Tanase | Y. Ikuhara | T. Yamamoto
Carbon content dependency of grain growth mechanism and grain growth inhibition mechanism in VC-doped WC–Co hardmetals is investigated. VC-doped WC–Co hardmetals with three different carbon contents...
A. Muthuraja | S. Senthilvelan
In this work, adhesive wear performance of the developed tungsten carbide based solid lubricant material is presented. In-house developed materials were evaluated for the sliding wear performance against...
Segregation layers of grain growth inhibitors at WC/WC interfaces in VC-doped submicron-grained WC–Co cemented carbides
Masaru Kawakami | Kozo Kitamura
The WC/WC interface in VC-doped submicron-grained WC–Co cemented carbides was investigated using high-resolution transmission electron microscopy (HRTEM) and energy-dispersive X-ray microanalysis (XMA)...
Effect of high ratio of reinforcement particle size to matrix powder size and volume fraction on microstructure, densification and tribological properties of SiCp reinforced metal matrix composites manufactured via hot pressing method
Ege Anıl Diler | Amir Ghiami | Rasim Ipek
The effects of reinforcement particle to matrix powder size ratio (Rs/Ms) and volume fraction of reinforcement particle on the microstructure, densification and tribological properties of SiCp reinforced...
D. McNamara | P. Alveen | D. Carolan | N. Murphy | A. Ivanković
Developing an understanding of the dominant failure mechanisms, and identifying the underlying structure–property relationship for polycrystalline diamond (PCD) are of fundamental importance for establishing...
Akihiro Nino | Tatsuro Hirabara | Shigeaki Sugiyama | Hitoshi Taimatsu
Tantalum carbide (TaC) ceramics without sintering additives or transition metals were consolidated within a sintering temperature range of 1350–1900°C using a resistance-heated hot-pressing technique....
Ayyappan Susila Praveen | J. Sarangan | S. Suresh | J. Siva Subramanian
In this work, 60wt.% NiCrSiB–40wt.% Al2O3 composite coating was produced on AISI 304 substrate material using the atmospheric plasma spraying technique. The coating surface has been characterised using...
M. Kavitha | G. Sudha Priyanga | R. Rajeswarapalanichamy | K. Iyakutti
The structural, electronic, mechanical and superconducting properties of rhenium carbide (ReC) and technetium carbide (TcC) are investigated using first principles calculations based on density functional...
Chunxin Li | Xuewei Lv | Jie Chen | Xuyang Liu | Chenguang Bai
The kinetics of titanium nitride synthesized with Ti and N2 at different temperatures were examined by differential scanning calorimetry and thermogravimetry. The maximum conversion degrees after 4h...
T. Teppernegg | P. Angerer | T. Klünsner | C. Tritremmel | C. Czettl
Coated WC–Co hard metal milling inserts applied in milling application show thermal fatigue induced by interrupted tool-workpiece contact and wear as the two main damage mechanisms. Depending on the...
Microscopic, mechanical and thermal properties of spark plasma sintered ZrB2 based composite containing polycarbosilane derived SiC
S. Chakraborty | D. Debnath | A.R. Mallick | R.K. Gupta | A. Ranjan | P.K. Das | D. Ghosh
ZrB2-SiCp (w/w 80:20) composites were spark plasma sintered at 1900, 2000 and 2100°C with ton=50ms and toff=5ms conditions under 50MPa pressure for 15min. SiC was obtained by in situ pyrolysis of polycarbosilane...
Cutting performance and wear characteristics of Ti(C,N)-based cermet tool in machining hardened steel
Xiao Chen | Jianfeng Xu | Qiming Xiao
Cutting performance and wear characteristics of Ti(C,N)-based cermet was investigated when turning a hardened steel (61–62 HRC). A TiN/Al2O3/Ti(C,N) multilayer coated cemented carbide tool was selected...
Xiaobin Li | Xiangming Xu | Qiusheng Zhou | Tiangui Qi | Guihua Liu | Zhihong Peng | Yuanfa Cui | Jianpu Li
Aiming to develop a novel technique to alleviate the environmental stresses caused by waste-water in the prevalent ammonium paratungstate manufacture process, preparation process of tricalcium tungstate...
Optimization to develop multiple response hardness and compressive strength of zirconia reinforced alumina by using RSM and GRA
S. Renold Elsen | T. Ramesh
In this work the effect of powder forming process parameters of zirconia reinforced alumina composites on micro hardness and compressive strength was studied. The weight percentages of zirconia added...
Ping Hu | Fan Yang | Kuai-She Wang | Zhi-tao Yu | Jiang-fei Tan | Rui Song | Bo-liang Hu | Hua Wang | Huan-Cheng He | Alex A. Volinsky
Powder metallurgy methods were utilized to prepare lanthanum-doped titanium–zirconium–molybdenum (La-TZM) and traditional TZM alloy plates. Tensile and Charpy impact tests were employed to study the...
Qiang Zhou | Pengwan Chen
In this study the W–Cu composites have been fabricated by hot-shock consolidation and then their mechanical properties were estimated by nano-indentation experiments. The initial powders were preheated...
Initial degradation of cemented carbides for rock drilling — Model studies of the tribological contact against rock
Mikael Olsson | Jannica Heinrichs | Karin Yvell | Staffan Jacobson
Hardness and fracture toughness are often used as the prime material parameters to characterise cemented carbides used in rock drilling. However, the deformation and wear of cemented carbide are too...
A Raman spectroscopy investigation into the influence of thermal treatments on the residual stress of polycrystalline diamond
Declan McNamara | Patricia Alveen | Signe Damm | Declan Carolan | James H. Rice | Neal Murphy | Alojz Ivanković
A systematic study of the residual stress distribution in number of polycrystalline diamond grades was performed using Raman spectroscopy. The analysis focuses on evaluating the stress state in the...
A. Gisario | M. Puopolo | S. Venettacci | F. Veniali
The present work deals with the post-treatment of thermally-sprayed WC–Co/NiCr coatings deposited by (High Velocity Oxygen Fuel) HVOF on a cylindrical substrate in AA 6082 T6 aluminium alloy with a...
Structuring of wear-affected copper electrodes for electrical discharge machining using Pulse Electrochemical Machining
Philipp Steuer | Olivier Weber | Dirk Bähre
The wear in electrical discharge machining exerts a great influence on the result and quality of the workpiece being machined. Especially complex structures can lead to high costs for electrode preparation....
Investigation on mechanochemical behavior of the TiO2–Mg–C system reactive mixtures in the synthesis of titanium carbide
Reza Ebrahimi-Kahrizsangi | Marzieh Alimardani | Omid Torabi
TiC–MgO composite was synthesized using mixtures of TiO2, Mg, and wood dust via a mechanochemical process. The influence of various Mg values (0–2.4mol) on the titanium carbide formation and the mechanism...
Investigation of normal recrystallization and abnormal recrystallization in pure tungsten sheet by EBSD
Fu-Zhong Xia | Hai-Gen Wei | Ming-Pu Wang | Dong-Hui Zhu
Normal recrystallization and abnormal recrystallization induced by Ni in pure tungsten (W) sheet were studied by EBSD. It was demonstrated that (001)[11¯0] and (111)[11¯0] textures in the deformed W...
B. Mahesh | K. Sairam | J.K. Sonber | T.S.R.Ch. Murthy | G.V.S. Nageswara Rao | T. Srinivasa Rao | J.K. Chakravartty
Spark plasma sintering (SPS) experiments were conducted to investigate the effect of the processing parameters such as temperature, mechanical pressure and dwell time on densification behavior of monolithic...
Le Zhou | Frank Kellogg | Clara Hofmeister | Anit Giri | Kyu Cho | Yongho Sohn
Nanostructured pure tungsten (W) powders have been fabricated through cryogenic attrition (i.e., cryomilling) in a liquid nitrogen medium for the first time. The microstructure and chemistry of W powders...
Wenjuan Zhang | Jiangtao Li | Zhongwei Zhao
The extraction of tungsten from scheelite concentrate using phosphoric acid as chelating agent in nitric acid solutions was investigated. The effects of the leaching parameters, such as stirring speed,...
Influence of the notch root radius on the fracture toughness of brittle metals: Nanostructure tungsten alloy, a case study
T. Palacios | J.Y. Pastor
Tungsten and tungsten-based alloys are considered to be candidate materials for next-generation nuclear fusion reactors. Unfortunately, their use in structural applications is compromised due to their...
Effect of B2O3 on physical properties of LZAS vitrified bond and mechanical properties of diamond composites
Lei Cui | Xiaojun Hao | Yu Tang | Zhanghong Zheng | Yuxing Yuan | Anxian Lu
The properties of vitrified bond abrasive tools, which are composed of diamond grains and Li2O–ZnO–Al2O3–SiO2 (LZAS) vitrified bond with and without B2O3 were comprehensively investigated. The results...
R.V. Krishnarao | Zafir Alam | D.K. Das | V.V. Bhanu Prasad | G. Madhusudan Reddy
Pressureless sintering of (ZrB2–SiC–B4C) composites with (Y2O3+Al2O3) additions has been studied. The vol.% of SiC, B4C, and (Y2O3+Al2O3) was varied from (26, 24, and 16) to (5, 4, and 5) respectively....
Microstructures and properties of Ni based composite coatings prepared by plasma spray welding with mixed powders
Shiming Huang | Daqian Sun | Wenquan Wang
The Ni based composite coatings have been obtained by using the plasma spray welding process and mixed powders (NiCrBSi+NiCr-Cr3C2+WC). Their microstructures and properties were studied. The results...
Xingyu Chen | Xuheng Liu | Zhongwei Zhao | Mingming Hao
The matte smelting method was developed to treat molybdenite using the white matte as the dissolvent. The key for achieving the process depended on whether or not molybdenite can form the molybdenum...
The effect of Ti additions on the microstructure and magnetic properties of laser clad FeNiCr/60%WC coatings
Jiaoxi Yang | Zhiyong Xiao | Xuanhe Miao | Xibing Wang | Feng Yang
FeNiCr/60%WC (wt) coatings with different Ti additions were deposited on P550 substrate by laser cladding to improve their nonmagnetic properties. The microstructures and chemical and phase compositions...
Peng Zhou | Ping Hu | Xinghong Zhang | Wenbo Han | Youhua Fan
The damage resistance and R-curve behavior of laminated ZrB2–SiC ceramic fabricated by hot-pressing were investigated using indentation-strength technique. The difference in fracture resistance properties...
The effect of Fe2Al5 as reducing agent in intermediate steps of 'Al2O3/TiC-Fe composite production process
Razieh Khoshhal | Mansour Soltanieh | Mohammad Ali Boutorabi
Al2O3/TiC-Fe cutting tools can be produced in-situ by using ilmenite, aluminum and graphite. The formation mechanism of the system was investigated in some researches. Most of them have diagnosed the...
Effect of Mo content on the structure and mechanical properties of TiAlMoN films deposited on WC–Co cemented carbide substrate by magnetron sputtering
Ke Yang | Guang Xian | Haibo Zhao | Hongyuan Fan | Jun Wang | Hui Wang | Hao Du
TiAlMoN films with different Mo contents were deposited by magnetron sputtering at various duty ratios of sputtering Mo target power source, after depositing a Ti interlayer. The concentrations and...
V. Bounhoure | S. Lay | S. Coindeau | S. Norgren | E. Pauty | J.M. Missiaen
The effect of Cr addition and C content on densification and microstructural evolution of WC–Co alloys in the solid state was studied. Two alloys containing Cr and an excess of carbon or tungsten were...