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.
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