Hot Isostatic Pressing Control of Tungsten-Based Composites

Schoell, Ryan; Reyes, Aspen; Suman, Guddi; Lam, Mila Nhu; Hamil, Justin; Rosenberg, Samantha G.; Treadwell, LaRico; Hattar, Khalid; Lang, Eric

doi:10.3390/inorganics11020082

Hot Isostatic Pressing Control of Tungsten-Based Composites

Journal Article · Wed Feb 15 23:00:00 EST 2023 · Inorganics

DOI:https://doi.org/10.3390/inorganics11020082· OSTI ID:1926773

Schoell, Ryan; Reyes, Aspen; Suman, Guddi; ; Hamil, Justin; Rosenberg, Samantha G.; ; ; Lang, Eric

Metal-oxide composites are commonly used in high temperature environments for their thermal stability and high melting points. Commonly employed with refractory oxides or carbides such as ZrC and HfC, these materials may be improved with the use of a low density, high melting point ceramic such as CeO2. In this work, the consolidation of W-CeO2 metal matrix composites in the high CeO2 concentration regime is explored. The CeO2 concentrations of 50, 33, and 25 wt.%, the CeO2 particle size from nanometer to micrometer, and various hot isostatic pressing temperatures are investigated. Decreasing the CeO2 concentration is observed to increase the composite density and increase the Vickers hardness. The CeO2 oxidation state is observed to be a combination of Ce3+ and Ce4+, which is hypothesized to contribute to the porosity of the composites. The hardness of the metal-oxide composite can be improved more than 2.5 times compared to pure W processed by the same route. This work offers processing guidelines for further consolation of oxide-doped W composites.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NA0003525

OSTI ID:: 1926773

Alternate ID(s):: OSTI ID: 2311744

Journal Information:: Inorganics, Journal Name: Inorganics Journal Issue: 2 Vol. 11; ISSN 2304-6740; ISSN INORCW

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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