摘要
采用机械活化法制粉,制备了活化元素Co含量不同的Mo-Cu合金。通过对密度、硬度、电导率、热导率、热膨胀系数的测试及组织的观察,研究了Co元素对Mo-Cu合金致密化工艺及其组织性能的影响。结果表明,Co与Mo形成了中间相Co7Mo6,这有利于烧结致密化温度的降低,当1250℃烧结1h后合金相对密度达97.71%;随着Co含量的添加,Mo-Cu合金的硬度值增加,电导率、热导率下降较为明显,而热膨胀系数变化幅度不大,与Al2O3陶瓷基片热膨胀系数比较接近;其显微组织呈细小均匀的网络结构。
Mo-Cu alloy,containing different Co contents were prepared by mechanical alloying method. Density,hardness,electric conductivity,thermal conductivity,thermal expansion coefficient and microstructure of the prepared Mo-Cu alloy were tested and observed to understand effects of Co element on densification and microstructure as well as properties of the alloy. The results show that the inert-phase Co7Mo6 is created between Co and Mo,Cu element,which is beneficial to the decrease of densification temperature,and the relative density of the Mo-Cu alloy reaches 97.7% with sintering at 1250℃. With increasing in Co element,the hardness of the Mo-Cu alloy is increased with the observed decrease of electric conductivity and thermal conductivity,however,the thermal expansion coefficient shows the slight fluctuation,which is near to that of Al2O3 ceramics. In addition,the microstructure of the Mo-Cu alloy exhibits homogeneous fine network structure.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第7期682-684,共3页
Special Casting & Nonferrous Alloys
基金
航空科学基金资助项目(2007ZF56016)
江西省教育厅科技项目(赣教技字[2006]166号)
