Improvement of oxidation resistance of a Mo-62Si-5B (at.%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO2 fabricated by spark plasma sintering

S. H. Wen; C. G. Zhou; J. B. Sha

doi:10.1016/j.corsci.2017.08.019

Improvement of oxidation resistance of a Mo-62Si-5B (at.%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO₂ fabricated by spark plasma sintering

S. H. Wen
, C. G. Zhou
, J. B. Sha^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

31 Scopus citations

Abstract

A Mo-Si-B-O alloy was obtained by spark plasma sintering (SPS) using fine Mo-62Si-5B (at.%) alloy powder (with a D₅₀ size of 2.21 μm). The SPS Mo-Si-B-O pseudo alloy consisted of fine MoSi₂/Mo₅Si₃/MoB/SiO₂ microstructure and showed better oxidation resistance than the coarsened microstructure. The SiO₂ that was pre-formed during SPS and the fine microstructure reduced the incubation stage of formation of continuously protective borosilicate layer, which is beneficial to the oxidation resistance. A “Mechanical locking” mechanism for the borosilicate layer by spilling of the pre-formed SiO₂ decreased cracks in the borosilicate-substrate interface, increased interface strength and integrity of the borosilicate layer.

Original language	English
Pages (from-to)	175-185
Number of pages	11
Journal	Corrosion Science
Volume	127
DOIs	https://doi.org/10.1016/j.corsci.2017.08.019
State	Published - Oct 2017

Keywords

A. Alloy
A. Intermetallics
B. SEM
B. TEM
B. XRD
C. Oxidation

Access to Document

10.1016/j.corsci.2017.08.019

Cite this

@article{998aea9f7640472c99ad5dce1e825e1f,

title = "Improvement of oxidation resistance of a Mo-62Si-5B (at.\%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO2 fabricated by spark plasma sintering",

abstract = "A Mo-Si-B-O alloy was obtained by spark plasma sintering (SPS) using fine Mo-62Si-5B (at.\%) alloy powder (with a D50 size of 2.21 μm). The SPS Mo-Si-B-O pseudo alloy consisted of fine MoSi2/Mo5Si3/MoB/SiO2 microstructure and showed better oxidation resistance than the coarsened microstructure. The SiO2 that was pre-formed during SPS and the fine microstructure reduced the incubation stage of formation of continuously protective borosilicate layer, which is beneficial to the oxidation resistance. A “Mechanical locking” mechanism for the borosilicate layer by spilling of the pre-formed SiO2 decreased cracks in the borosilicate-substrate interface, increased interface strength and integrity of the borosilicate layer.",

keywords = "A. Alloy, A. Intermetallics, B. SEM, B. TEM, B. XRD, C. Oxidation",

author = "Wen, \{S. H.\} and Zhou, \{C. G.\} and Sha, \{J. B.\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = oct,

doi = "10.1016/j.corsci.2017.08.019",

language = "英语",

volume = "127",

pages = "175--185",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Improvement of oxidation resistance of a Mo-62Si-5B (at.%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO2 fabricated by spark plasma sintering

AU - Wen, S. H.

AU - Zhou, C. G.

AU - Sha, J. B.

PY - 2017/10

Y1 - 2017/10

N2 - A Mo-Si-B-O alloy was obtained by spark plasma sintering (SPS) using fine Mo-62Si-5B (at.%) alloy powder (with a D50 size of 2.21 μm). The SPS Mo-Si-B-O pseudo alloy consisted of fine MoSi2/Mo5Si3/MoB/SiO2 microstructure and showed better oxidation resistance than the coarsened microstructure. The SiO2 that was pre-formed during SPS and the fine microstructure reduced the incubation stage of formation of continuously protective borosilicate layer, which is beneficial to the oxidation resistance. A “Mechanical locking” mechanism for the borosilicate layer by spilling of the pre-formed SiO2 decreased cracks in the borosilicate-substrate interface, increased interface strength and integrity of the borosilicate layer.

AB - A Mo-Si-B-O alloy was obtained by spark plasma sintering (SPS) using fine Mo-62Si-5B (at.%) alloy powder (with a D50 size of 2.21 μm). The SPS Mo-Si-B-O pseudo alloy consisted of fine MoSi2/Mo5Si3/MoB/SiO2 microstructure and showed better oxidation resistance than the coarsened microstructure. The SiO2 that was pre-formed during SPS and the fine microstructure reduced the incubation stage of formation of continuously protective borosilicate layer, which is beneficial to the oxidation resistance. A “Mechanical locking” mechanism for the borosilicate layer by spilling of the pre-formed SiO2 decreased cracks in the borosilicate-substrate interface, increased interface strength and integrity of the borosilicate layer.

KW - A. Alloy

KW - A. Intermetallics

KW - B. SEM

KW - B. TEM

KW - B. XRD

KW - C. Oxidation

UR - https://www.scopus.com/pages/publications/85028419484

U2 - 10.1016/j.corsci.2017.08.019

DO - 10.1016/j.corsci.2017.08.019

M3 - 文章

AN - SCOPUS:85028419484

SN - 0010-938X

VL - 127

SP - 175

EP - 185

JO - Corrosion Science

JF - Corrosion Science

ER -

Improvement of oxidation resistance of a Mo-62Si-5B (at.%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO₂ fabricated by spark plasma sintering

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this