Co-deposition of aluminum and silicon on pure molybdenum substrate using halide activated pack cementation treatments

J. L. Xu; F. S. Liu; C. G. Zhou; S. K. Gong; H. B. Xu

Co-deposition of aluminum and silicon on pure molybdenum substrate using halide activated pack cementation treatments

J. L. Xu^*
, F. S. Liu
, C. G. Zhou
, S. K. Gong
, H. B. Xu

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

4 Scopus citations

Abstract

A multi-component diffusion coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo (Si, Al)₂ through the development of halide activated pack cementation coating process on pure Mo substrate. Results show that Mo (Si, Al)₂ is formed as a main phase on the surface and a little amount of Mo₅Si₃ is also created. The total thickness of coating is tens of μm at 1373K. During the cyclic oxidation test at high temperature (at about 1323K in air), mullite (3Al₂O₃·2SiO₂) and some SiO₂ formed. The addition of Al is beneficial for MoSi₂ coating and the Al-doped coating exhibits only a small weight gain and protects the Mo substrate, while the MoSi₂ coating without Al suffers a significant weight loss, indicating a loss of volatile MoO₃ after cycles.

Original language	English
Pages (from-to)	167-171
Number of pages	5
Journal	Acta Metallurgica Sinica (English Letters)
Volume	15
Issue number	2
State	Published - Apr 2002

Keywords

3AlO2SiO
Halide activated pack cementation
Mo (Si, Al)
Multi-component coating
Oxidation resistance

Cite this

@article{3483bb41f1aa4b468cd0b2a65cf89408,

title = "Co-deposition of aluminum and silicon on pure molybdenum substrate using halide activated pack cementation treatments",

abstract = "A multi-component diffusion coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo (Si, Al)2 through the development of halide activated pack cementation coating process on pure Mo substrate. Results show that Mo (Si, Al)2 is formed as a main phase on the surface and a little amount of Mo5Si3 is also created. The total thickness of coating is tens of μm at 1373K. During the cyclic oxidation test at high temperature (at about 1323K in air), mullite (3Al2O3·2SiO2) and some SiO2 formed. The addition of Al is beneficial for MoSi2 coating and the Al-doped coating exhibits only a small weight gain and protects the Mo substrate, while the MoSi2 coating without Al suffers a significant weight loss, indicating a loss of volatile MoO3 after cycles.",

keywords = "3AlO2SiO, Halide activated pack cementation, Mo (Si, Al), Multi-component coating, Oxidation resistance",

author = "Xu, \{J. L.\} and Liu, \{F. S.\} and Zhou, \{C. G.\} and Gong, \{S. K.\} and Xu, \{H. B.\}",

year = "2002",

month = apr,

language = "英语",

volume = "15",

pages = "167--171",

journal = "Acta Metallurgica Sinica (English Letters)",

issn = "1006-7191",

publisher = "Springer Nature",

number = "2",

}

TY - JOUR

T1 - Co-deposition of aluminum and silicon on pure molybdenum substrate using halide activated pack cementation treatments

AU - Xu, J. L.

AU - Liu, F. S.

AU - Zhou, C. G.

AU - Gong, S. K.

AU - Xu, H. B.

PY - 2002/4

Y1 - 2002/4

N2 - A multi-component diffusion coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo (Si, Al)2 through the development of halide activated pack cementation coating process on pure Mo substrate. Results show that Mo (Si, Al)2 is formed as a main phase on the surface and a little amount of Mo5Si3 is also created. The total thickness of coating is tens of μm at 1373K. During the cyclic oxidation test at high temperature (at about 1323K in air), mullite (3Al2O3·2SiO2) and some SiO2 formed. The addition of Al is beneficial for MoSi2 coating and the Al-doped coating exhibits only a small weight gain and protects the Mo substrate, while the MoSi2 coating without Al suffers a significant weight loss, indicating a loss of volatile MoO3 after cycles.

AB - A multi-component diffusion coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo (Si, Al)2 through the development of halide activated pack cementation coating process on pure Mo substrate. Results show that Mo (Si, Al)2 is formed as a main phase on the surface and a little amount of Mo5Si3 is also created. The total thickness of coating is tens of μm at 1373K. During the cyclic oxidation test at high temperature (at about 1323K in air), mullite (3Al2O3·2SiO2) and some SiO2 formed. The addition of Al is beneficial for MoSi2 coating and the Al-doped coating exhibits only a small weight gain and protects the Mo substrate, while the MoSi2 coating without Al suffers a significant weight loss, indicating a loss of volatile MoO3 after cycles.

KW - 3AlO2SiO

KW - Halide activated pack cementation

KW - Mo (Si, Al)

KW - Multi-component coating

KW - Oxidation resistance

UR - https://www.scopus.com/pages/publications/0036552441

M3 - 文章

AN - SCOPUS:0036552441

SN - 1006-7191

VL - 15

SP - 167

EP - 171

JO - Acta Metallurgica Sinica (English Letters)

JF - Acta Metallurgica Sinica (English Letters)

IS - 2

ER -

Co-deposition of aluminum and silicon on pure molybdenum substrate using halide activated pack cementation treatments

Abstract

Keywords

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