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OALib Journal期刊
ISSN: 2333-9721
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zr基大块非晶合金成分的等电子浓度和等原子尺寸判据
Keywords: 大块非晶,zr基合金,电子浓度,原子尺寸
Abstract:
？制备了6种合金zr65.5al5.6ni6.5cu22.4,zr65.3al6.5ni8.2cu20,zr65al7.5ni10cu17.5,zr64.8al8.3ni11.4cu15.5,zr64.5al9.2ni13.2cu13.1和zr63.8al11.4ni17.2cu7.6，共晶成分位于合金zr64.5al9.2ni13.2cu13.1和合金zr63.8al11.4ni17.2cu7.6的成分之间。这6种合金均显示了非晶相的形成和较宽的过冷液相区范围?tx值，以及较大的约化玻璃转变温度trg值。除合金zr63.8al11.4ni17.2cu7.6的δtx值为87k外，其余5种成分合金的δtx值均在97k以上，最宽的达105k，表明这6种合金是一个具有大玻璃形成能力和高热稳定性的非晶合金系列。合金zr63.8al11.4ni17.2cu7.6是6种合金中玻璃形成能力和热稳定性最高的，其tg、tx和trg值最高。inoue非晶合金zr65al7.5ni10cu17.5并不是最佳非晶成分。提出以等电子浓度和等原子尺寸规律作为设计大块非晶合金成分的判据。
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