CAJ | 학술논문

用透射电子显微镜(TEM)的选区电予衍射、衍衬及x射线能谱分析了真空熔铸Cu一25Cr合金触头材料和烧结CuCr25粉末合金触头材料中Cu/Cr两相界面及其显微组织.一些细小的Cr二次枝晶与Cu基体有择优取向关系,即(110)c,//(111)c.和[011].,∥[112]c.,间距约6 nm的单列错配位错分布在Cr/Cu两相的半共格界面上,这表明Cu一25Cr合金材料中Cr/Cu两相的界面具有更好的协调性.与Cu.25Cr合金材料相反,CuCr25粉末合金烧结材料中Cu/Cr粒子之间形成的是非共格界面,且有少量的Al扣,和Cr20,等夹杂物聚集在松散的Cu/Cr颗粒间的界面上.据此,本文讨论了CuCr触头材料中Cu/Cr两相间的界面结构对材料机械性能、断裂特性及电接触性能的影响.
용투사전자현미경(TEM)적선구전여연사、연츤급x사선능보분석료진공용주Cu일25Cr합금촉두재료화소결CuCr25분말합금촉두재료중Cu/Cr량상계면급기현미조직.일사세소적Cr이차지정여Cu기체유택우취향관계,즉(110)c,//(111)c.화[011].,∥[112]c.,간거약6 nm적단렬착배위착분포재Cr/Cu량상적반공격계면상,저표명Cu일25Cr합금재료중Cr/Cu량상적계면구유경호적협조성.여Cu.25Cr합금재료상반,CuCr25분말합금소결재료중Cu/Cr입자지간형성적시비공격계면,차유소량적Al구,화Cr20,등협잡물취집재송산적Cu/Cr과립간적계면상.거차,본문토론료CuCr촉두재료중Cu/Cr량상간적계면결구대재료궤계성능、단렬특성급전접촉성능적영향.
The microstructure and interface of Cu/Cr phases in vacuum casting Cu-25Cr alloy and sintered CuCr25 p/m contact materials were investigated by transmission electron microscopy (TEM). Some fine secondary Cr-dendrites have preferred orientation relationships of (110)Cr//(111)Cu and [011]Cr//[112]Cu, and a single set of misfit dislocations separatedby a space of ～6 nm are distributed on the semicoherent interfaces of Cr/Cu phases, which shown that the interface structure of two phases in the Cu-25Cr alloy material is better coordination. In contrast to the Cu-25Cr alloy material, incoherent interfacebetween Cr/Cu particles in CuCr25 p/m material were formed by frictional force,and a few inclusions of Al2O3 and Cr2O3 were aggregated on the lose bonding interface of Cu/Crparticles in the materials. Thereby the effects of interface structure of Cr/Cu phases in the CuCr contact materials on the mechanical properties, fracture characteristics and contact performance of contact materials are discussed.