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

腐蚀学报（英文）, 2005, 17(1): 34-38. doi: 10.3969/j.issn.1002-6495.2005.01.009

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

黄粮 ^1, , 孙晓峰 ^2, , 管恒荣 ^3, , 胡壮麒 ^4,

1.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

2.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

3.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

4.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

关键词：低压气相沉积 , 渗铝 , 氧化 , M951

DGRADATION BEHAVIOR OF ALUMINIDE COATINGS ON DIRECTIONALLY SOLIDIFIED NICKEL BASE SUPERALLOY M951

研究了定向凝固高温合金M951的低压气相沉积制备的渗铝涂层在900、100、1050和1100℃下的恒温氧化行为,利用SEM、EDX对氧化膜形貌进行了观察,同时结合TEM、EPMA和逐层剥离X射线衍射对涂层在氧化过程中的相变进行了研究.结果表明:随着温度的升高和氧化时间的延长,氧化膜中亚稳态的θ-Al2O3逐渐转变为稳态的α-Al2O3;涂层中由于Al的消耗发生了由β→γ'→γ的相变,而在涂层扩散区中在不同的氧化温度下形成了一系列的富Cr、W和Mo的碳化物和TCP相.

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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

DGRADATION BEHAVIOR OF ALUMINIDE COATINGS ON DIRECTIONALLY SOLIDIFIED NICKEL BASE SUPERALLOY M951

参考文献