Department of Mechanical Engineering, University College London, London, UK.
J R Soc Interface. 2010 Nov 6;7(52):1641-5. doi: 10.1098/rsif.2010.0036. Epub 2010 Mar 3.
Spark plasma sintering has been used for the first time to prepare the ASTM F75 cobalt-chromium-molybdenum (Co-Cr-Mo) orthopaedic alloy composition using nanopowders. In the preliminary work presented in this report, the effect of processing variables on the structural features of the alloy (phases present, grain size and microstructure) has been investigated. Specimens of greater than 99.5 per cent theoretical density were obtained. Carbide phases were not detected in the microstructure but oxides were present. However, harder materials with finer grains were produced, compared with the commonly used cast/wrought processing methods, probably because of the presence of oxides in the microstructure.
首次使用火花等离子烧结技术，使用纳米粉末来制备 ASTM F75 型钴铬钼（Co-Cr-Mo）骨科合金成分。在本报告中介绍的初步工作中，研究了加工变量对合金结构特征（存在的相、晶粒尺寸和微观结构）的影响。获得了大于理论密度 99.5%的试样。虽然在微观结构中没有检测到碳化物相，但存在氧化物。然而，与常用的铸造/锻造加工方法相比，生产出了更硬、晶粒更细的材料，这可能是由于微观结构中存在氧化物。
