论文部分内容阅读
通过在真空电弧熔炼炉内对合金铸锭进行反复熔炼处理,获得到了凝固组织不同的Zr65Al7·5Cu12·5Ni10Ag5合金铸锭.在相同的制备条件下,由凝固组织不同的合金铸锭通过吸铸法制备得到了薄片非晶合金.利用差示扫描量热法(DSC)对非晶合金的晶化动力学进行了分析.x射线衍射谱表明,在Zr65Al7·5Cu12·5Ni10Ag5非晶合金晶化过程中,二十面体准晶相(I相)作为初生相析出.Kissinger分析结果表明,合金铸锭的凝固组织细化,相对应的非晶合金发生晶化时,I相形成与分解的有效激活能都增大,说明非晶合金及析出的I相的热稳定性都提高.从结构的遗传性角度就合金铸锭凝固组织对相应非晶合金晶化过程中二十面体准晶相的形成动力学的影响进行了讨论.
By repeatedly melting the alloy ingot in the vacuum arc melting furnace, Zr65Al7.5Cu12.5Ni10Ag5 alloy ingot with different solidified structures was obtained, and under the same preparation conditions, different alloy ingots with different solidified structures were obtained by the method of suction casting The amorphous alloy was prepared and the crystallization kinetics of the amorphous alloy was analyzed by differential scanning calorimetry (DSC) .The X-ray diffraction spectra showed that during the crystallization of Zr65Al7.5Cu12.5Ni10Ag5 amorphous alloy , Icosahedral quasicrystalline phase (I phase) precipitated as the primary phase.Kissinger analysis results show that the alloy ingot solidification microstructure refinement, the corresponding amorphous alloy crystallization occurs, I phase formation and decomposition of the effective activation energy Both increase, indicating that the thermal stability of amorphous alloy and precipitated phase I are improved.From the structural genetic perspective, the formation of icosahedral quasicrystalline phase in the solidification structure of the corresponding amorphous alloy during the crystallization of the corresponding amorphous alloy The impact of learning was discussed.