电沉积纳米复合材料的超塑性研究

材料科学与工艺, 2013, 21(4): 95-99.

电沉积纳米复合材料的超塑性研究

王国峰 ^1, , 骆俊廷 ^2, , 王长文 ^3, , 蒋少松 ^4, , 卢振 ^5,

1.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001;燕山大学亚稳材料国家重点实验室,秦皇岛

2.燕山大学亚稳材料国家重点实验室,秦皇岛

3.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001

4.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001

5.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001

基金项目: 国家自然科学基金(51275129) 哈尔滨科技创新人才基金(2011RFLXG002)

关键词： Al2O3/Ni-Co纳米复合材料 , 低温超塑性 , 脉冲电沉积 , 显微结构 , 变形机制

Superplasticity of nanocomposite fabricated by electrodeposition

WANG Guo-feng ^1, , WANG Chang-wen ^2, , JIANG Shao-song ^3, , LU Zhen ^4, ,

1.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001;燕山大学亚稳材料国家重点实验室,秦皇岛

2.燕山大学亚稳材料国家重点实验室,秦皇岛

3.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001

4.哈尔滨工业大学金属精密热加工国家级重点实验室,哈尔滨150001

Keywords： Al2O3/Ni-Co nanocomposite , low temperature superplasticity , pulse current electrodeposition , microstructure , deformation mechanism

采用脉冲电沉积技术制备了含不同Al2O3颗粒的Al2O3/Ni-Co纳米复合材料,在应变速率从8.33×10-4 s-1到1.67×10-2 s-1,温度从723K到823K的范围内,研究了它们的超塑性拉伸变形行为,确定了最佳超塑性条件并获得了最大延伸率.采用SEM和TEM对电沉积和超塑变形前后试件的显微结构进行了表征.应用晶粒长大行为和协调机制对合金和复合材料的超塑性进行了对比研究和讨论.

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