摘要
The effect of 5%Cr(mole fraction) on the scaling behavior of Ni-10Al was investigated at 900℃and 1 000℃with the aim to discuss the third element effect(TEE). The oxidation rate of the ternary alloy containing Cr is much slower than the corresponding binary alloys at both temperatures. A dense external scale of NiO overlying a zone of internal oxide precipitates forms on Ni-10Al, while Ni-5Cr-10Al develops a protective layer. So the addition of Cr promotes the formation of alumina scale. The possible mechanism of Cr on the oxidation of Ni-Al alloy is discussed.
The effect of 5%Cr（mole fraction） on the scaling behavior of Ni-10Al was investigated at 900 ℃ and 1 000 ℃ with the aim to discuss the third element effect（TEE）. The oxidation rate of the ternary alloy containing Cr is much slower than the corresponding binary alloys at both temperatures. A dense external scale of NiO overlying a zone of internal oxide precipitates forms on Ni-10Al, while Ni-5Cr-10Al develops a protective layer. So the addition of Cr promotes the formation of alumina scale. The possible mechanism of Cr on the oxidation of Ni-Al alloy is discussed.
出处
《中国有色金属学会会刊：英文版》
CSCD
2006年第A03期2042-2045,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(200603206) supported by the Shenyang Institute of Chemical Technology for PhD
关键词
铬
合金
氧化行为
有色金属
界面反应
Ni-Cr-Al alloy
Ni-10Al alloy
oxidation
third-element effect
