Improvement in oxidation resistance of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment

Ping Zhang; Xiping Guo

doi:10.1016/j.corsci.2014.11.009

Improvement in oxidation resistance of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment

Ping Zhang, Xiping Guo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

36 Scopus citations

Abstract

Modified silicide coating was prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including first siliconizing and then aluminizing. The two-step coating is composed of an Al-rich outermost layer, a (Nb,X)Si₂ outer layer and a (Ti,Nb)₅Si₄ inner layer. The coating possesses an enhanced oxidation resistance at 1250°C due to the presence of the Al-rich outermost layer. The mass gain of the coating after oxidation at 1250°C for 100h is 3.7mg/cm², and a duplex scale consisting of an Al₂O₃ outer layer and a SiO₂-matrix inner layer forms.

Original language	English
Pages (from-to)	101-107
Number of pages	7
Journal	Corrosion Science
Volume	91
DOIs	https://doi.org/10.1016/j.corsci.2014.11.009
State	Published - 1 Feb 2015

Keywords

A. Intermetallic
A. Metal coatings
C. Oxidation

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10.1016/j.corsci.2014.11.009

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title = "Improvement in oxidation resistance of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment",

abstract = "Modified silicide coating was prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including first siliconizing and then aluminizing. The two-step coating is composed of an Al-rich outermost layer, a (Nb,X)Si2 outer layer and a (Ti,Nb)5Si4 inner layer. The coating possesses an enhanced oxidation resistance at 1250°C due to the presence of the Al-rich outermost layer. The mass gain of the coating after oxidation at 1250°C for 100h is 3.7mg/cm2, and a duplex scale consisting of an Al2O3 outer layer and a SiO2-matrix inner layer forms.",

keywords = "A. Intermetallic, A. Metal coatings, C. Oxidation",

author = "Ping Zhang and Xiping Guo",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd.",

year = "2015",

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day = "1",

doi = "10.1016/j.corsci.2014.11.009",

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T1 - Improvement in oxidation resistance of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment

AU - Zhang, Ping

AU - Guo, Xiping

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Modified silicide coating was prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including first siliconizing and then aluminizing. The two-step coating is composed of an Al-rich outermost layer, a (Nb,X)Si2 outer layer and a (Ti,Nb)5Si4 inner layer. The coating possesses an enhanced oxidation resistance at 1250°C due to the presence of the Al-rich outermost layer. The mass gain of the coating after oxidation at 1250°C for 100h is 3.7mg/cm2, and a duplex scale consisting of an Al2O3 outer layer and a SiO2-matrix inner layer forms.

AB - Modified silicide coating was prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including first siliconizing and then aluminizing. The two-step coating is composed of an Al-rich outermost layer, a (Nb,X)Si2 outer layer and a (Ti,Nb)5Si4 inner layer. The coating possesses an enhanced oxidation resistance at 1250°C due to the presence of the Al-rich outermost layer. The mass gain of the coating after oxidation at 1250°C for 100h is 3.7mg/cm2, and a duplex scale consisting of an Al2O3 outer layer and a SiO2-matrix inner layer forms.

KW - A. Intermetallic

KW - A. Metal coatings

KW - C. Oxidation

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U2 - 10.1016/j.corsci.2014.11.009

DO - 10.1016/j.corsci.2014.11.009

M3 - 文章

AN - SCOPUS:84916202628

SN - 0010-938X

VL - 91

SP - 101

EP - 107

JO - Corrosion Science

JF - Corrosion Science

ER -

Improvement in oxidation resistance of silicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment

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Keywords

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