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强流脉冲离子束辐照对DZ4镍基高温合金表面结构和性能的影响 被引量:1

Surface Modification of DZ4 Ni-Based Alloys by High Intensity Pulsed Ion Beam Irradiation
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摘要 利用强流脉冲离子束(HIPIB)辐照DZ4镍基高温合金表面,离子束的加速电压为250 kV,脉冲宽度为70ns,束流密度为100A/cm2,脉冲次数分别为2,5,10和15次.根据扫描电镜分析得出,脉冲次数少时(2次和5次)离子束辐照后DZ4合金的表面出现熔坑,随着辐照次数的增加,表面的熔坑数量减少,多次脉冲(10次和15次)处理后,表面熔坑基本消失,表面变得平整;并且在近表层大约1μm~2 μm范围内晶粒细化.X射线衍射分析显示离子束处理后表面层存在压应力.HIPIB辐照处理使DZ4合金的表面在200 μm的范围内硬度有提高,同时其耐腐蚀和耐磨性能有明显提高.
出处 《真空科学与技术学报》 EI CAS CSCD 北大核心 2006年第z1期124-128,共5页 Chinese Journal of Vacuum Science and Technology
基金 武器装备预研基金资助课题
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参考文献7

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