乔桂英,荆天辅,肖福仁

• 1:燕山大学环境与化学工程学院河北省应用化学重点实验室
• 2:燕山大学材料科学与工程学院亚稳材料制备技术与科学国家重点实验室

摘要(Abstract)：

采用DSC、XRD和TEM等手段研究了喷射电沉积制备的5.1 nm纳米晶Co78Ni22合金的热稳定性,并对其热力学参数进行了分析与计算。结果表明,该纳米Co-Ni合金具有良好的热稳定性,以10℃/min加热时的DSC放热峰值对应温度为389.9℃,放热焓为14.26 J·g-1,晶粒长大激活能为269.1 kJ·mol-1。在加热过程中,温度为340℃时,合金晶粒尺寸急剧长大,同时ε相向α相转变,相变的结束温度约为370℃,高温形成的α相在随后冷却中不发生转变。DSC测定的晶粒长大为相变结束后的α相晶粒长大,其激活能与自扩散激活能相近,因此晶粒长大由晶内扩散控制。

关键词(KeyWords)： 纳米Co78Ni22合金;热稳定性;晶粒长大

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金项目(598250)

作者(Author): 乔桂英,荆天辅,肖福仁

DOI: 10.13289/j.issn.1009-6264.2014.08.003

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