MoSz在空间对接摩擦材料烧结过程中的行为变化

采用粉末冶金技术制备了空间对接用铜基摩擦材料，利用X射线衍射及定量化学分析技术对MoS2在材料烧结过程中的变化行为及与其他组元之间的作用进行研究。结果表明，MoS2在加压烧结过程中存在三个方面的反应：在高温下分解成Mo和S,并造成了S元素的损失；与Cu作用形成了复杂的铜钼硫化合物；与Cu反应生成了Cu的硫化物，该类化合物具有与MoS2相类似的层状结构，有一定的润滑作用。MoS2高温分解后或MoS2与Cu反应产生的Mo元素与石墨反应形成了Mo的碳化物。另外，双飞粉的加入不仅与材料中的Mo元素作用形成CaMoO4并且改变了铜钼硫化合物、Cu的硫化物以及Mo的碳化物中各元素的麾尔比。

Transformation of MoS2 during sintering process of space docking friction material

Cu-based friction material was prepared by powder metallurgy(P/M) technique.The transformation of lubricant MoS2 and its action with other component in material during sintering were studied by X-ray diffraction and quantitative chemistry analysis.The results show that there are three reactions of MoS2 in sintering process as follows: a part of MoS2 decomposes into Mo and S at higher temperature,results the loss of S element;another part of MoS2 responds with Cu into an intricate compound made of Cu,Mo and S elements;the surplus part of MoS2 reacts with Cu into copper sulfide during sintering.Mo element reacts with graphite into molybdenum carbide.The heavy calcium carbonate powder added could react with Mo element into CaMoO4,and change the mole ratio of Cu-Mo-S intricate compound,copper sulfide and molybdenum carbide.