The effect of α-Zr matrix microstructure on the formation of oxide film and the corrosion resistance of new zirconium alloys

Hai Xia Zhang; Zhong Kui Li; Bing She Xu; Yong Zhen Wang; Lian Zhou

doi:10.3969/j.issn.1001-9731.2014.08.013

The effect of α-Zr matrix microstructure on the formation of oxide film and the corrosion resistance of new zirconium alloys

Hai Xia Zhang
, Zhong Kui Li
, Bing She Xu
, Yong Zhen Wang
, Lian Zhou

Taiyuan University of Technology
Northwest Institute for Nonferrous Metal Research

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The corrosion kinetics of NZ2 and NZ8 alloys were investigated by static autoclave test in 400°C/ 10.3 MPa steam; the matrix microstructures of the two alloys were tested by TEM and neutron diffraction method. The crystal structure of oxide films of NZ2 and NZ8 alloys after corroded was investigated by XRD and Raman spectra methods in this paper. The results of corrosion kinetics indicated that the corrosion resistance of NZ2 alloy in 400°C/10.3 MPa steam was better than that of NZ8 alloy; TEM studies on the matrixes showed that the precipitates of NZ2 were Zr(Fe, Cr)₂ and Zr(Fe, Cr, Nb)₂, and Nb content in the matrix was less than solid solution limit. However, the precipitates of NZ8 were Zr-Fe-Nb, and Nb was supersaturated in the matrix. The neutron diffraction result confirmed that the Zr(Fe, Cr)₂ precipitates of NZ2 matrix were C14 structure. A great deal of Zr-Fe-Nb precipitates and the supersaturated Nb content in NZ8 matrix increased the local volume expansion and accelerated the crack formation, which resulted in the higher corrosion rate of NZ8.Moreover, the less than solid solution Nb content in the matrix and Zr(Fe, Cr)₂, Zr(Fe, Cr, Nb)₂ precipitates improved the corrosion resistance of NZ2 alloy.

Original language	English
Pages (from-to)	8062-8066
Number of pages	5
Journal	Gongneng Cailiao/Journal of Functional Materials
Volume	45
Issue number	8
DOIs	https://doi.org/10.3969/j.issn.1001-9731.2014.08.013
State	Published - 2014
Externally published	Yes

Keywords

Corrosion resistance
Nb content
Oxide film
Precipitate
α-Zr matrix

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10.3969/j.issn.1001-9731.2014.08.013

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title = "The effect of α-Zr matrix microstructure on the formation of oxide film and the corrosion resistance of new zirconium alloys",

abstract = "The corrosion kinetics of NZ2 and NZ8 alloys were investigated by static autoclave test in 400°C/ 10.3 MPa steam; the matrix microstructures of the two alloys were tested by TEM and neutron diffraction method. The crystal structure of oxide films of NZ2 and NZ8 alloys after corroded was investigated by XRD and Raman spectra methods in this paper. The results of corrosion kinetics indicated that the corrosion resistance of NZ2 alloy in 400°C/10.3 MPa steam was better than that of NZ8 alloy; TEM studies on the matrixes showed that the precipitates of NZ2 were Zr(Fe, Cr)2 and Zr(Fe, Cr, Nb)2, and Nb content in the matrix was less than solid solution limit. However, the precipitates of NZ8 were Zr-Fe-Nb, and Nb was supersaturated in the matrix. The neutron diffraction result confirmed that the Zr(Fe, Cr)2 precipitates of NZ2 matrix were C14 structure. A great deal of Zr-Fe-Nb precipitates and the supersaturated Nb content in NZ8 matrix increased the local volume expansion and accelerated the crack formation, which resulted in the higher corrosion rate of NZ8.Moreover, the less than solid solution Nb content in the matrix and Zr(Fe, Cr)2, Zr(Fe, Cr, Nb)2 precipitates improved the corrosion resistance of NZ2 alloy.",

keywords = "Corrosion resistance, Nb content, Oxide film, Precipitate, α-Zr matrix",

author = "Zhang, \{Hai Xia\} and Li, \{Zhong Kui\} and Xu, \{Bing She\} and Wang, \{Yong Zhen\} and Lian Zhou",

year = "2014",

doi = "10.3969/j.issn.1001-9731.2014.08.013",

language = "英语",

volume = "45",

pages = "8062--8066",

journal = "Gongneng Cailiao/Journal of Functional Materials",

issn = "1001-9731",

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number = "8",

}

TY - JOUR

T1 - The effect of α-Zr matrix microstructure on the formation of oxide film and the corrosion resistance of new zirconium alloys

AU - Zhang, Hai Xia

AU - Li, Zhong Kui

AU - Xu, Bing She

AU - Wang, Yong Zhen

AU - Zhou, Lian

PY - 2014

Y1 - 2014

N2 - The corrosion kinetics of NZ2 and NZ8 alloys were investigated by static autoclave test in 400°C/ 10.3 MPa steam; the matrix microstructures of the two alloys were tested by TEM and neutron diffraction method. The crystal structure of oxide films of NZ2 and NZ8 alloys after corroded was investigated by XRD and Raman spectra methods in this paper. The results of corrosion kinetics indicated that the corrosion resistance of NZ2 alloy in 400°C/10.3 MPa steam was better than that of NZ8 alloy; TEM studies on the matrixes showed that the precipitates of NZ2 were Zr(Fe, Cr)2 and Zr(Fe, Cr, Nb)2, and Nb content in the matrix was less than solid solution limit. However, the precipitates of NZ8 were Zr-Fe-Nb, and Nb was supersaturated in the matrix. The neutron diffraction result confirmed that the Zr(Fe, Cr)2 precipitates of NZ2 matrix were C14 structure. A great deal of Zr-Fe-Nb precipitates and the supersaturated Nb content in NZ8 matrix increased the local volume expansion and accelerated the crack formation, which resulted in the higher corrosion rate of NZ8.Moreover, the less than solid solution Nb content in the matrix and Zr(Fe, Cr)2, Zr(Fe, Cr, Nb)2 precipitates improved the corrosion resistance of NZ2 alloy.

AB - The corrosion kinetics of NZ2 and NZ8 alloys were investigated by static autoclave test in 400°C/ 10.3 MPa steam; the matrix microstructures of the two alloys were tested by TEM and neutron diffraction method. The crystal structure of oxide films of NZ2 and NZ8 alloys after corroded was investigated by XRD and Raman spectra methods in this paper. The results of corrosion kinetics indicated that the corrosion resistance of NZ2 alloy in 400°C/10.3 MPa steam was better than that of NZ8 alloy; TEM studies on the matrixes showed that the precipitates of NZ2 were Zr(Fe, Cr)2 and Zr(Fe, Cr, Nb)2, and Nb content in the matrix was less than solid solution limit. However, the precipitates of NZ8 were Zr-Fe-Nb, and Nb was supersaturated in the matrix. The neutron diffraction result confirmed that the Zr(Fe, Cr)2 precipitates of NZ2 matrix were C14 structure. A great deal of Zr-Fe-Nb precipitates and the supersaturated Nb content in NZ8 matrix increased the local volume expansion and accelerated the crack formation, which resulted in the higher corrosion rate of NZ8.Moreover, the less than solid solution Nb content in the matrix and Zr(Fe, Cr)2, Zr(Fe, Cr, Nb)2 precipitates improved the corrosion resistance of NZ2 alloy.

KW - Corrosion resistance

KW - Nb content

KW - Oxide film

KW - Precipitate

KW - α-Zr matrix

UR - https://www.scopus.com/pages/publications/84902094773

U2 - 10.3969/j.issn.1001-9731.2014.08.013

DO - 10.3969/j.issn.1001-9731.2014.08.013

M3 - 文章

AN - SCOPUS:84902094773

SN - 1001-9731

VL - 45

SP - 8062

EP - 8066

JO - Gongneng Cailiao/Journal of Functional Materials

JF - Gongneng Cailiao/Journal of Functional Materials

IS - 8

ER -

The effect of α-Zr matrix microstructure on the formation of oxide film and the corrosion resistance of new zirconium alloys

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Keywords

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