OXIDATION RESISTANCE OF TIAL IMPROVED BY A COCRAL COATING

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	OXIDATION RESISTANCE OF TIAL IMPROVED BY A COCRAL COATING
	TANIGUCHI, S ; SHIBATA, T ; ASANUMA, N ; LUO, H ; WANG, FH ; WU, WT
刊名	JOURNAL DE PHYSIQUE IV
	1993-12-01
卷号	3 期号:C9 页码:403-410
ISSN号	1155-4339
通讯作者	TANIGUCHI, S()
英文摘要	The oxidation behavior of TiAl coupons coated with a fine-grained Co-3OCr-4Al (mass %) layer of about 30 mum thickness was studied at 1100-1400 K in a flow of purified oxygen at atmospheric pressure for up to 500 ks. Three oxidation stages were recognized: initial transient, parabolic, and acceleration stages. However, at 1100 K a parabolic stage continues for more than 800 ks. The parabolic rate constants agree well with the reported values for alumina-former alloys. Voids are developed mainly at the scale/coating and coating/substrate interfaces as the oxidation proceeds. This is attributable to a slightly loose structure of the coating, its recrystallization during oxidation, and a Kirkendall effect due to preferential diffusion of Co into the substrate. The accelerated oxidation can be explained in terms of the formation of microcracks in convoluted scales. At 1400 K the growth of rutile on the scale seems to be additionally contributing to the acceleration.
WOS研究方向	Physics
语种	英语
出版者	EDITIONS PHYSIQUE
WOS记录号	WOS:A1993MY70800044
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/125980]
专题	金属研究所_中国科学院金属研究所
通讯作者	TANIGUCHI, S
作者单位	1.OSAKA UNIV,GRAD SCH ENGN,OSAKA,JAPAN 2.CHINESE ACAD SCI,INST CORROS & PROTECT MET,SHENYANG 110015,PEOPLES R CHINA
推荐引用方式 GB/T 7714	TANIGUCHI, S,SHIBATA, T,ASANUMA, N,et al. OXIDATION RESISTANCE OF TIAL IMPROVED BY A COCRAL COATING[J]. JOURNAL DE PHYSIQUE IV,1993,3(C9):403-410.
APA	TANIGUCHI, S,SHIBATA, T,ASANUMA, N,LUO, H,WANG, FH,&WU, WT.(1993).OXIDATION RESISTANCE OF TIAL IMPROVED BY A COCRAL COATING.JOURNAL DE PHYSIQUE IV,3(C9),403-410.
MLA	TANIGUCHI, S,et al."OXIDATION RESISTANCE OF TIAL IMPROVED BY A COCRAL COATING".JOURNAL DE PHYSIQUE IV 3.C9(1993):403-410.