Microstructure and corrosion resistance of (Mo1-xNbx)5Si3 silicide alloy prepared by hot-pressing

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	Microstructure and corrosion resistance of (Mo1-xNbx)5Si3 silicide alloy prepared by hot-pressing
	Chen, Hui; Ma, Qin; Zhao, Xue; Xu, Ke
刊名	Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy
	2011-06-01
卷号	16 期号:3 页码:386-391
关键词	Alloys Chemical stability Corrosion rate Corrosion resistance Crystallite size Dissolution Hydrochloric acid Molybdenum Molybdenum oxide Niobium Niobium alloys Passivation Polarization Silicides Silicon Sintering Stainless steel Steel corrosion Anodic polarization curves Corrosion behavior Corrosion-resistant materials Elemental powders Excellent corrosion resistances Grain size HCl solution Hydrochloric acid solution Intermetallic alloys Metal silicide Passivation film Polarization curve Polarization curves Refractory metal silicides Relative density Silicide alloys
ISSN号	16730224
英文摘要	Using Mo, Nb and Si elemental powders as raw materials, refractory metal silicide alloys (Mo1-xNbx)5Si3 (x=0, 0.2, 0.4) were designed and fabricated by hot-pressing sintering technology. Both the corrosion behavior of (Mo1-xNbx)5Si3 intermetallic alloys in 1 mol/L HCl solusion and the effect of Nb content in alloys on the structure and corrosion resistance of the alloys were investigated by polarization curve and immersion corrosion. The results show that the grain size decreases, relative density and organization uniformity increases with the increase of Nb content in the alloys. The crystallite size and relative density of the Mo3Nb2Si3 are 44.1 nm and 96.1%, respectively. The second passivation behavior of anodic polarization curves show passivation, dissolution and passivation again. The alloys have excellent corrosion resistance in 1 mol/L HCl solution owing to the formation of passivation film of MoO2 and SiO2 in surface of the alloys and the high chemical stability of (Mo1-xNbx)5Si3 intermetallic. The corrosion resistance of the alloys improves with the increase of Nb content. The immersion corrosion rate of Mo5Si3, Mo4NbSi3 and Mo3Nb2Si3 are 0.064 mm/a, 0.039 mm/a and 0.020 mm/a, respectively and are greatly lower than that of traditional 0Cr18Ni9 stainless steel corrosion resistant materials which is 12.04 mm/a in 0.1 mol/L hydrochloric acid solution.
语种	中文
出版者	Central South University, Lushan Nanlu, Changsha, 410043, China
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111203]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院电气工程与信息工程学院
作者单位	State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Chen, Hui,Ma, Qin,Zhao, Xue,et al. Microstructure and corrosion resistance of (Mo1-xNbx)5Si3 silicide alloy prepared by hot-pressing[J]. Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy,2011,16(3):386-391.
APA	Chen, Hui,Ma, Qin,Zhao, Xue,&Xu, Ke.(2011).Microstructure and corrosion resistance of (Mo1-xNbx)5Si3 silicide alloy prepared by hot-pressing.Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy,16(3),386-391.
MLA	Chen, Hui,et al."Microstructure and corrosion resistance of (Mo1-xNbx)5Si3 silicide alloy prepared by hot-pressing".Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy 16.3(2011):386-391.