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DZ4合金渗铝-硅涂层1100℃氧化时的元素扩散规律 被引量：2

Element Diffusion of Al-Si Coating on Superalloy DZ4 at 1100 ℃
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摘要 以定向凝固镍基高温合金DZ4为基体,采用料浆法在合金表面制备铝-硅涂层;对该涂层试样进行1100℃抗高温氧化性能试验,并对氧化过程中各元素的分布进行了分析。结果表明:随氧化时间增加,涂层逐渐分为两层,外层为单一β-NiAl相,内层主要由β-NiAl相构成,层内分布着块状和颗粒状的碳化物;高温氧化过程中,硅元素不断向涂层内部扩散,并与基体合金中向外扩散的钼、钨元素结合形成富硅的M6C,并逐渐形成M6C隔层,阻碍镍与铝的互扩散,提高了涂层在高温下的抗氧化能力。 The Al-Si coating on DZ4 superalloy was prepared by slurry process.High temperature oxidation experiments of Al-Si coating on DZ4 were carried out at 1 100 ℃ in air and element diffusion in the oxidation was analyzed.The results indicate that Al-Si coating is composed of two layers. The outer layer is a single phase β-NiAl,while inner layer consiste of β-NiAl and carbide precipitates.The combination of inward-diffusing of Si and outward-diffusing of elements(mainly Mo and W) leds to the formation of Si-rich...
作者 杨世伟 夏德贵 孙杰 张志明 杨晓
机构地区 哈尔滨工程大学材料科学与化学工程学院
出处 《机械工程材料》 CAS CSCD 北大核心 2008年第3期5-7,12,共4页 Materials For Mechanical Engineering
关键词 DZ4高温合金 铝-硅涂层 元素扩散 氧化 DZ4 superalloy Al-Si coating element diffusion oxidation
分类号 TG174.4 [金属学及工艺—金属表面处理]
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共引文献30

同被引文献40

  • 1黄粮,孙晓峰,管恒荣,胡壮麒.定向凝固高温合金M951低压渗铝涂层的高温氧化及相变过程[J].腐蚀科学与防护技术,2005,17(1):34-38. 被引量：9
  • 2李元元,夏伟,张文,罗宗强.高强度耐磨铝青铜合金及其摩擦学特性[J].中国有色金属学报,1996,6(3):76-80. 被引量：38
  • 3邓芬燕,邹安全,邓俊彦,马跃新.强韧化热处理对ZQAl9-4铝铁青铜组织性能的影响[J].矿冶工程,2006,26(4):61-63. 被引量：5
  • 4熊玉明,李明升,李松林.热障涂层与镍基高温合金界面的互扩散行为[J].粉末冶金材料科学与工程,2007,12(2):63-69. 被引量：11
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机械工程材料
2008年 第3期

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