【摘要】：采用氮?dú)忪F化制備Al-20Si-7.5Ni-3Cu-1Mg-0.25Fe合金粉末,利用激光粒度分析儀、金相顯微鏡、掃描電子顯微鏡、X射線衍射儀和熱分析儀對(duì)合金粉末的粒度分布、組織、形貌、組成相和相演變規(guī)律進(jìn)行研究。結(jié)果顯示,該氮?dú)忪F化粉末的中粒徑為29.5μm,形貌多為球形或類球形,在尺寸較大的粉末顆粒表面存在凹坑和衛(wèi)星球現(xiàn)象,尺寸較小的粉末表面則相對(duì)光滑。粉末內(nèi)部存在塊狀初晶硅和片狀亞穩(wěn)金屬間化合物,這種亞穩(wěn)金屬間化合物在310℃時(shí)會(huì)分解為穩(wěn)定的耐熱相。
[Abstract]:Al-20Si-7.5Ni-3Cu-1Mg-0.25Fe alloy powder was prepared by nitrogen atomization. The particle size distribution, microstructure, morphology, composition phase and phase evolution of the alloy powder were studied by laser particle size analyzer, metallographic microscope, scanning electron microscope, X-ray diffractometer and thermal analyzer. The results show that the medium particle size of the nitrogen atomized powder is 29.5 渭 m, and the morphology is spherical or spherical. There are pits and satellite spheres on the surface of the powder particles with large size, while the surface of the powder with smaller size is relatively smooth. There are bulk primary silicon and flake metastable intermetallic compounds in the powder, which decompose into stable heat-resistant phases at 310 鈩，

本文編號(hào)：2508540