宁向梅,黄金亮,殷镖,张兴渊

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

采用单辊快速凝固法制备了Mg80Cu10Y10合金薄带,并对合金薄带进行热处理,利用XRD、DSC和HRTEM分析研究了该合金薄带的晶化过程及其晶化后的微观结构。结果表明:快速凝固Mg80Cu10Y10合金薄带为单一的非晶态结构,其约化玻璃转变温度Trg为0.62,具有较强的非晶形成能力;非晶合金具有三阶段晶化行为;在热处理温度为423 K时合金仍为非晶态;当温度达到473 K时,合金发生明显晶化,在非晶基体上弥散析出Mg2Cu、Cu2Y和hcp-Mg纳米晶粒;随着温度由523 K升高至623 K时,析出晶粒尺寸增大、数目减少,合金中的晶体相为hcp-Mg、Mg2Cu和Mg24Y5。

关键词(KeyWords)： 快速凝固;Mg80Cu10Y10;金属玻璃;非晶形成能力;晶化

Abstract:

Keywords:

基金项目(Foundation): 河南科技大学青年科学研究基金项目(2006QN028);; 河南省杰出青年基金项目(074100510008)

作者(Author): 宁向梅,黄金亮,殷镖,张兴渊

DOI: 10.13289/j.issn.1009-6264.2013.04.007

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