摘要
运用固体经验电子理论(EET),计算了Al-Ag合金析出的亚稳相γ/(Ag2Al)和稳相γ(Ag2Al)的价电子结构。结果表明析出相γ/和γ中的最强共价键强比合金基体的键强有明显的提高,最强键和次强键构成更加稳固的键络,这些由Ag-Ag原子构成的键络,分布在合金中使位错运动难以切割,从而使合金的强度得到一定提高。从价电子结构层次解释了Al-Ag合金时效过程中,γ/(Ag2Al)相和γ(Ag2Al)相对基体所起的硬化作用。
The valence electron structures of γ/ (Ag2Al) andγ(Ag2Al) were analyzed according to the 揺mpirical electronic theory in solid and molecules?EET). The results showed that the strongest bond and bond energy in the precipitation phases of γ/ and γwere apparently enhanced. The strongest bond and the inferior bond made up a bond web. It was difficult for the dislocation to cut the webs in the Al alloy, hence the hardness of the alloy was increased. The precipitation of γ/ (Ag2Al) and γ(Ag2Al) effecting hardening of the alloy was explained from the point of view of the valence electron structure.
出处
《贵金属》
CAS
CSCD
2004年第3期22-24,10,共4页
Precious Metals
基金
国家自然科学基金项目(50061001)
广西科学基金项目(桂科配0135006
桂科自0007020
桂科基0342004-1)
广西"十百千人才工程"项目(2001207)。
