(1. 中国工程物理研究院, 绵阳 621900;
2. 中国核动力研究院， 成都 610041)
摘 要: 研究了火花等离子烧结工艺与YG10、 YG12两种纳米硬质合金性能的关系。 然后采用火花等离子烧结技术制备了硬质合金功能梯度材料，该材料由纳米WC/10%Co、纳米WC/12%Co、微米 WC/15%Co 混合粉以及不锈钢圆片烧结而成。显微硬度压痕显示该材料各层间的应力较小。
关键字: 火花等离子烧结； WC/Co硬质合金； 功能梯度材料
（1. Chinese Academy of Engineering and Physics, Mianyang 621900, China;
2. Nuclear Power Institute of China, Chengdu 610041, China）
Abstract:The density, hardness and fracture toughness of YG10, YG12 nano hardmetals prepared by different spark plasma sintering processes were measured. A functionally graded material(FGM) was also produced by spark plasma sintering technology(SPS), and sintering powders of nano WC/10%Co, nano WC/12%Co, micro WC/15%Co and disk of stainless steel. The SPS processing led to FGM free of internal stress, which was measured using Vickers indentations.
Key words: spark plasma sintering; WC/Co hardmetal; functionally graded materials
