【摘要】 根据等电子浓度和等原子尺寸判据设计了四种 Zr-Ti-Al-Ni系合金,并用激光诱导燃烧合成的方法制备了材料.研究发现,其合成产物主要由金属间化合物和Ti/Zr固溶体组成,在成分Zr55Ti10.8Al17.1Ni17.1 和 Zr50Ti21.6Al14.2Ni14.2中还出现了非晶相.合成产物的硬度和摩擦磨损特性与相组成有密切的关系,非晶含量越大,合金硬度值越低,平均摩擦系数越高.更多还原

【Abstract】 Zr-Ti-based alloys were designed according to the electron concentration (e/a) and average atomic size rules. All the compositions satisfy the same electron concentration e/a=1.5 and average atomic radius 0.1496 nm as those of the ZreoAl2oNi2o bulk metallic glasses (BMG). A new technique, laser-induced combustion synthesis (LCS) technique, was applied to fabricate these alloys. The LCS products mainly consist of intermetallic phases, but in Zr55Ti10.8Al17.1Ni17.1 and Zr50Ti21.eAl14.2Ni14.2 the amorphous phases are found. The hardness and tribology characters are dosely related to the phase content. In general, the more the amorphous phase, the lower the hardness and the higher the average friction coefficient.更多还原