Ultra-high temperature oxidation of a hafnium carbide-based solid solution ceramic composite

David W. Lipke; Sergey V. Ushakov; Alexandra Navrotsky; Wesley P. Hoffman

doi:10.1016/j.corsci.2013.11.049

Ultra-high temperature oxidation of a hafnium carbide-based solid solution ceramic composite

David W. Lipke, Sergey V. Ushakov, Alexandra Navrotsky, Wesley P. Hoffman

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

26 Scopus citations

Abstract

Hafnium carbide-based solid solution ceramics with yttria additions were consolidated via hot pressing utilizing chromium carbide as a transient liquid sintering agent. Selected samples were oxidized at temperatures exceeding 2200. °C under high velocity airflow to determine their potential for service in ultra-high temperature environments. Cross-sectional examination revealed a complex multi-layer scale comprising a highly porous exterior region, a dense multi-phase interior region, and an oxygen- and carbon-containing interlayer consisting of nanocrystalline graphite in an amorphous or nanocrystalline oxide matrix. Outward diffusion of mobile cations is speculated to play an important role in establishing the observed scale morphology.

Original language	English (US)
Pages (from-to)	402-407
Number of pages	6
Journal	Corrosion Science
Volume	80
DOIs	https://doi.org/10.1016/j.corsci.2013.11.049
State	Published - Mar 2014
Externally published	Yes

Keywords

A. Ceramic
C. High temperature corrosion
C. Oxidation

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2013.11.049

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title = "Ultra-high temperature oxidation of a hafnium carbide-based solid solution ceramic composite",

abstract = "Hafnium carbide-based solid solution ceramics with yttria additions were consolidated via hot pressing utilizing chromium carbide as a transient liquid sintering agent. Selected samples were oxidized at temperatures exceeding 2200. °C under high velocity airflow to determine their potential for service in ultra-high temperature environments. Cross-sectional examination revealed a complex multi-layer scale comprising a highly porous exterior region, a dense multi-phase interior region, and an oxygen- and carbon-containing interlayer consisting of nanocrystalline graphite in an amorphous or nanocrystalline oxide matrix. Outward diffusion of mobile cations is speculated to play an important role in establishing the observed scale morphology.",

keywords = "A. Ceramic, C. High temperature corrosion, C. Oxidation",

author = "Lipke, {David W.} and Ushakov, {Sergey V.} and Alexandra Navrotsky and Hoffman, {Wesley P.}",

note = "Funding Information: This research was performed while the author (D.W.L.) held a National Research Council Associateship Award at the Air Force Research Laboratory, Edwards AFB, CA 93524 USA. We gratefully acknowledge the assistance of Ron Witt (EBSD Analytical Inc.), Marietta Fernandez (AFRL/RQRC), Nick Botto (UC Davis), Alan Hicklin (UC Davis), Dan Siebert (LHMEL), and John Bagford (LHMEL) for their expertise and assistance with material testing and characterization efforts. Work at UC Davis was funded by the Office of Naval Research under award N00014-12-1-0196. ",

year = "2014",

month = mar,

doi = "10.1016/j.corsci.2013.11.049",

language = "English (US)",

volume = "80",

pages = "402--407",

journal = "Corrosion Science",

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publisher = "Elsevier Limited",

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T1 - Ultra-high temperature oxidation of a hafnium carbide-based solid solution ceramic composite

AU - Lipke, David W.

AU - Ushakov, Sergey V.

AU - Navrotsky, Alexandra

AU - Hoffman, Wesley P.

N1 - Funding Information: This research was performed while the author (D.W.L.) held a National Research Council Associateship Award at the Air Force Research Laboratory, Edwards AFB, CA 93524 USA. We gratefully acknowledge the assistance of Ron Witt (EBSD Analytical Inc.), Marietta Fernandez (AFRL/RQRC), Nick Botto (UC Davis), Alan Hicklin (UC Davis), Dan Siebert (LHMEL), and John Bagford (LHMEL) for their expertise and assistance with material testing and characterization efforts. Work at UC Davis was funded by the Office of Naval Research under award N00014-12-1-0196.

PY - 2014/3

Y1 - 2014/3

N2 - Hafnium carbide-based solid solution ceramics with yttria additions were consolidated via hot pressing utilizing chromium carbide as a transient liquid sintering agent. Selected samples were oxidized at temperatures exceeding 2200. °C under high velocity airflow to determine their potential for service in ultra-high temperature environments. Cross-sectional examination revealed a complex multi-layer scale comprising a highly porous exterior region, a dense multi-phase interior region, and an oxygen- and carbon-containing interlayer consisting of nanocrystalline graphite in an amorphous or nanocrystalline oxide matrix. Outward diffusion of mobile cations is speculated to play an important role in establishing the observed scale morphology.

AB - Hafnium carbide-based solid solution ceramics with yttria additions were consolidated via hot pressing utilizing chromium carbide as a transient liquid sintering agent. Selected samples were oxidized at temperatures exceeding 2200. °C under high velocity airflow to determine their potential for service in ultra-high temperature environments. Cross-sectional examination revealed a complex multi-layer scale comprising a highly porous exterior region, a dense multi-phase interior region, and an oxygen- and carbon-containing interlayer consisting of nanocrystalline graphite in an amorphous or nanocrystalline oxide matrix. Outward diffusion of mobile cations is speculated to play an important role in establishing the observed scale morphology.

KW - A. Ceramic

KW - C. High temperature corrosion

KW - C. Oxidation

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DO - 10.1016/j.corsci.2013.11.049

M3 - Article

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SN - 0010-938X

VL - 80

SP - 402

EP - 407

JO - Corrosion Science

JF - Corrosion Science

ER -

Ultra-high temperature oxidation of a hafnium carbide-based solid solution ceramic composite

Abstract

Keywords

ASJC Scopus subject areas

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