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Microstructure and mechanical properties of Al2O3 - WC - Co composites obtained by spark plasma sintering
International Journal of Refractory Metals & Hard Materials ( IF 4.2 ) Pub Date : 2020-10-20 , DOI: 10.1016/j.ijrmhm.2020.105408
Heytor V.S.B. Azevêdo , Rafael A. Raimundo , David D.S. Silva , Luís M.F. Morais , Daniel A. Macedo , Danielle G.L. Cavalcante , Uílame U. Gomes

This work reports the Spark Plasma Sintering (SPS) of composites derived from a mixture of alumina (Al2O3), tungsten carbide (WC) and cobalt (Co) for applications in abrasive machining. Powders with nominal composition 80 wt% Al2O3–18 wt% WC - 2 wt% Co were processed by high energy milling and sintered at 1550 °C for 5 min. Specimens with apparent porosity of 1.15% and microhardness of 26.41 GPa were obtained. The analysis of the friction coefficient curve showed a variation of 0.54. The composite wear rate reached 1.978× 10−6 mm3/Nm. The surface roughness increased by 101.4% after the wear test.



中文翻译:

火花等离子体烧结Al 2 O 3 -WC-Co复合材料的组织与力学性能。

这项工作报告了由氧化铝(Al 2 O 3),碳化钨(WC)和钴(Co)的混合物衍生而来的复合材料的火花等离子体烧结(SPS),用于研磨加工。通过高能研磨对标称成分为80 wt%Al 2 O 3 –18 wt%WC-2 wt%Co的粉末进行处理,并在1550°C下烧结5分钟。得到的试样的表观孔隙率为1.15%,显微硬度为26.41 GPa。摩擦系数曲线的分析显示出0.54的变化。复合磨损率达到1.978×10 -6  mm 3 / Nm。磨损试验后,表面粗糙度增加了101.4%。

更新日期:2020-10-30
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