High temperature oxidation of the three-phase alloys Cu-20Ni-30Cr and Cu-20Ni-40Cr under a low oxygen pressure

IMR OpenIR

	High temperature oxidation of the three-phase alloys Cu-20Ni-30Cr and Cu-20Ni-40Cr under a low oxygen pressure
	Zhang, XJ ; Al-Omary, M ; Niu, Y
通讯作者	Zhang, XJ(yniu@imr.ac.cn)
	2005
发表期刊	HIGH TEMPERATURE MATERIALS AND PROCESSES
ISSN	0334-6455
卷号	24 期号:3 页码:175-182
摘要	The oxidation of two ternary Cu-Ni-Cr alloys containing approximately 30 and 40 at.% Cr, but with a similar Ni content, Cu-20Ni-30Cr and Cu-20Ni-40Cr, was studied at 973-1073 K in H-2-CO2 mixtures providing an oxygen pressure of 10(-19) atm, below the dissociation pressure of nickel and copper oxides. Both alloys are composed of a mixture of three phases, where the phase with the largest copper and lowest chromium content (alpha) forms the matrix and contains a dispersion of particles of the other two phases, one with an intermediate content of Ni and Cr (beta) and another richest in chromium (gamma). The oxidation kinetics of the two alloys at both temperatures exhibited a transition from a first stage, which was nearly parabolic except for Cu-20Ni-40Cr at 1073 K, to a second parabolic stage with a reduced rate constant. Both alloys formed a continuous external chromia scale after 24h oxidation at the two temperatures. The internal oxidation of chromium was essentially absent from the two alloys. The oxidation mechanism is discussed by taking into account the possible effects of the presence of three phases in the oxidation of ternary alloys.
关键词	Cu-Ni-Cr three-phase oxidation low oxygen pressure
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000231793800005
出版者	FREUND PUBLISHING HOUSE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/83023
通讯作者	Zhang, XJ
作者单位	1.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China 2.Shenyang Inst Chem Technol, Shenyang 110142, Peoples R China 3.Univ Sharjah, Dept Basic Sci, Sharjan, U Arab Emirates
推荐引用方式 GB/T 7714	Zhang, XJ,Al-Omary, M,Niu, Y. High temperature oxidation of the three-phase alloys Cu-20Ni-30Cr and Cu-20Ni-40Cr under a low oxygen pressure[J]. HIGH TEMPERATURE MATERIALS AND PROCESSES,2005,24(3):175-182.
APA	Zhang, XJ,Al-Omary, M,&Niu, Y.(2005).High temperature oxidation of the three-phase alloys Cu-20Ni-30Cr and Cu-20Ni-40Cr under a low oxygen pressure.HIGH TEMPERATURE MATERIALS AND PROCESSES,24(3),175-182.
MLA	Zhang, XJ,et al."High temperature oxidation of the three-phase alloys Cu-20Ni-30Cr and Cu-20Ni-40Cr under a low oxygen pressure".HIGH TEMPERATURE MATERIALS AND PROCESSES 24.3(2005):175-182.