High temperature stability and thermal expansion behavior of molybdenum-chromium M2C carbides

C. A. Knepfler; K. T. Faber; J. Weertman; G. B. Olson; C. R. Hubbard; O. B. Cavin; N. Packen

doi:10.1016/S0925-8388(96)02442-5

High temperature stability and thermal expansion behavior of molybdenum-chromium M₂C carbides

C. A. Knepfler, K. T. Faber^*, J. Weertman, G. B. Olson, C. R. Hubbard, O. B. Cavin, N. Packen

^*Corresponding author for this work

Materials Science and Engineering

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

10 Scopus citations

Abstract

The thermal expansion of molybdenum-chromium M₂C carbides has been studied over the temperature range from room temperature to 900 °C using high-temperature X-ray diffraction. Hyperstoichiometric carbides demonstrated hysteretic thermal expansion/contraction as excess carbon was lost upon heating above 750 °C in an inert environment. Coefficients of thermal expansion of both the a and c axes increase linearly with chromium content.

Original language	English (US)
Pages (from-to)	139-142
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	248
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(96)02442-5
State	Published - Feb 15 1997

Funding

This work was supported by the Army Research Office through Grant #DAAH-04-93-0471 with supplemental support from the Ford Motor Company. K.T.F. was supported by the National Science Foundation through Grant #DMR-9023629.

Keywords

High-temperature X-ray diffraction
MC carbides
Non-stoichiometry
Thermal expansion

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0925-8388(96)02442-5

Cite this

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title = "High temperature stability and thermal expansion behavior of molybdenum-chromium M2C carbides",

abstract = "The thermal expansion of molybdenum-chromium M2C carbides has been studied over the temperature range from room temperature to 900 °C using high-temperature X-ray diffraction. Hyperstoichiometric carbides demonstrated hysteretic thermal expansion/contraction as excess carbon was lost upon heating above 750 °C in an inert environment. Coefficients of thermal expansion of both the a and c axes increase linearly with chromium content.",

keywords = "High-temperature X-ray diffraction, MC carbides, Non-stoichiometry, Thermal expansion",

author = "Knepfler, {C. A.} and Faber, {K. T.} and J. Weertman and Olson, {G. B.} and Hubbard, {C. R.} and Cavin, {O. B.} and N. Packen",

note = "Funding Information: This work was supported by the Army Research Office through Grant #DAAH-04-93-0471 with supplemental support from the Ford Motor Company. K.T.F. was supported by the National Science Foundation through Grant #DMR-9023629.",

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T1 - High temperature stability and thermal expansion behavior of molybdenum-chromium M2C carbides

AU - Knepfler, C. A.

AU - Faber, K. T.

AU - Weertman, J.

AU - Olson, G. B.

AU - Hubbard, C. R.

AU - Cavin, O. B.

AU - Packen, N.

N1 - Funding Information: This work was supported by the Army Research Office through Grant #DAAH-04-93-0471 with supplemental support from the Ford Motor Company. K.T.F. was supported by the National Science Foundation through Grant #DMR-9023629.

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N2 - The thermal expansion of molybdenum-chromium M2C carbides has been studied over the temperature range from room temperature to 900 °C using high-temperature X-ray diffraction. Hyperstoichiometric carbides demonstrated hysteretic thermal expansion/contraction as excess carbon was lost upon heating above 750 °C in an inert environment. Coefficients of thermal expansion of both the a and c axes increase linearly with chromium content.

AB - The thermal expansion of molybdenum-chromium M2C carbides has been studied over the temperature range from room temperature to 900 °C using high-temperature X-ray diffraction. Hyperstoichiometric carbides demonstrated hysteretic thermal expansion/contraction as excess carbon was lost upon heating above 750 °C in an inert environment. Coefficients of thermal expansion of both the a and c axes increase linearly with chromium content.

KW - High-temperature X-ray diffraction

KW - MC carbides

KW - Non-stoichiometry

KW - Thermal expansion

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