| Al_(82)Ni_(10)Y_8合金雾化粉末的超高压固结成形及晶化过程 |
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| 引用本文： | 何世文,刘咏,郭晟. Al_(82)Ni_(10)Y_8合金雾化粉末的超高压固结成形及晶化过程[J]. 金属热处理, 2009, 34(11): 47-52 |
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| 作者姓名： | 何世文 刘咏 郭晟 |
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| 作者单位： | 湖南工业大学,冶金工程学院,湖南,株洲,412000;中南大学,粉末冶金国家重点实验室,湖南,长沙,410083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 用紧耦合气雾化方法制备了Al_(82)Ni_(10)Y_8合金粉末.利用X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)和差示扫描量热(DSC)方法分析了粉末特征.结果表明,粒径＜26 μm的粉末具有非晶和纳米晶结构.在450 ℃对粒径＜26 μm的合金粉末进行了超高压固结,随后在600 ℃对固结块体合金进行了1 h的热处理.利用电子探针分析了热处理后Al_(82)Ni_(10)Y_8合金的晶化过程,根据雾化粉末的XRD分析结果,表明其晶化过程为:非晶→α-Al+非晶→α-Al+非晶+Al_(19)Ni_5Y_3→α-Al+Al_3(Ni,Y)+ Al_(23)Ni_6Y_4 + Al_(19)Ni_5Y_3.
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| 关 键 词： | Al-Ni-Y合金 非晶 电子探针 热处理 晶化 |
Ultra-high pressure consolidation and crystallization process of atomized Al_(82)Ni_(10)Y_8 alloy powder |
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| HE Shi-wen,LIU Yong,GUO Sheng. Ultra-high pressure consolidation and crystallization process of atomized Al_(82)Ni_(10)Y_8 alloy powder[J]. Heat Treatment of Metals, 2009, 34(11): 47-52 |
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| Authors: | HE Shi-wen LIU Yong GUO Sheng |
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| Abstract: | Al_(82)Ni_(10)Y_8 alloy powder was prepared by close-coupled gas atomization.The features of powder were investigated by X-ray diffractometry,scanning electron microscopy,transmission electron microscopy and differential scanning calorimetry.The results show that the powder with diameter smaller than 26 μm preserves amorphous and nano-crystalline structure.Al_(82)Ni_(10)Y_8 alloy powder with diameter smaller than 26 μm was consolidated at 450 ℃ using ultra-high pressure pseudo-HIP and then was annealed at 600 ℃ for 1 h.The crystallization behavior was analyzed by electron probe micro-analysis.Integrated with XRD of gas atomized powder,the crystallization process of Al_(82)Ni_(10)Y_8 alloy is as follows：amorphous→α-Al+amorphous→α-Al+amorphous+ Al_(19)Ni_5Y_3→α-Al+Al_3(Ni,Y)+Al_(23)Ni_6Y_4 + Al_(19)Ni_5Y_3. |
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| Keywords: | Al-Ni-Y alloy amorphous electron probe heat treatment crystallization |
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