Preparation of ultrafine WC-Co cermets by combining pretreatment and consolidation with spark plasma sintering
来源期刊：Rare Metals2009年第4期
论文作者：ZHAO Shixiana, SONG Xiaoyana, WANG Mingshenga, LIU Guoquanb, and ZHANG Jiuxinga a Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing , China b School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing , China
文章页码：391 - 395
摘 要：Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering （SPS）. Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature as high as 1300°C. The WC-10wt.%Co cermet bulk prepared by the optimized milling, pretreatment, and SPS processing achieves excellent mechanical properties with a Vickers hardness of HV 1643, a fracture toughness of 13.1 MPa?m1/2 and a transverse rapture strength of 3100 MPa.
ZHAO Shixiana, SONG Xiaoyana, WANG Mingshenga, LIU Guoquanb, and ZHANG Jiuxinga a Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China b School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100080, China
摘 要：Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering （SPS）. Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature as high as 1300°C. The WC-10wt.%Co cermet bulk prepared by the optimized milling, pretreatment, and SPS processing achieves excellent mechanical properties with a Vickers hardness of HV 1643, a fracture toughness of 13.1 MPa?m1/2 and a transverse rapture strength of 3100 MPa.
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