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Title: In-situ metal binder-phase formation to make WC-FeNi Cermets with spark plasma sintering from WC, Fe, Ni, and carbon powders

Abstract

In this work, high-density WC-FeNi ceramic-metal (cermet) composites were fabricated using liquid-phase spark plasma sintering/field-assisted sintering technology (SPS/FAST) with in-situ formation of metal binder phase. The precursor materials were micron-sized powders of WC, Fe, Ni, and C. A low melting point from a eutectic reaction of the powders enabled the in-situ formation of FeNi alloy and facilitates liquid-phase sintering of the WC. The carbon powder was added to stabilize the formation of the binder phase. Electron backscatter diffraction (EBSD) was performed to measure grain size and orientation. The composite exhibited a 99% theoretical density and a microstructure consisting of rounded and contiguous WC grains. The average grain size is 10.5 μm. The composite has a maximum hardness of 16.1 GPa. This research provides a fast and cost-effective approach to fabricate hard metals.

Authors:
ORCiD logo [1];  [2];  [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Colorado State Univ., Fort Collins, CO (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
OSTI Identifier:
1607183
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Refractory and Hard Metals
Additional Journal Information:
Journal Volume: 88; Journal Issue: C; Journal ID: ISSN 0263-4368
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; WC-FeNi; Carbon window; In-situ formation; Cermet; Hardmetal

Citation Formats

Cramer, Corson L, Preston, Alexander D., Ma, Kaka, and Nandwana, Peeyush. In-situ metal binder-phase formation to make WC-FeNi Cermets with spark plasma sintering from WC, Fe, Ni, and carbon powders. United States: N. p., 2020. Web. doi:10.1016/j.ijrmhm.2020.105204.
Cramer, Corson L, Preston, Alexander D., Ma, Kaka, & Nandwana, Peeyush. In-situ metal binder-phase formation to make WC-FeNi Cermets with spark plasma sintering from WC, Fe, Ni, and carbon powders. United States. doi:10.1016/j.ijrmhm.2020.105204.
Cramer, Corson L, Preston, Alexander D., Ma, Kaka, and Nandwana, Peeyush. Mon . "In-situ metal binder-phase formation to make WC-FeNi Cermets with spark plasma sintering from WC, Fe, Ni, and carbon powders". United States. doi:10.1016/j.ijrmhm.2020.105204.
@article{osti_1607183,
title = {In-situ metal binder-phase formation to make WC-FeNi Cermets with spark plasma sintering from WC, Fe, Ni, and carbon powders},
author = {Cramer, Corson L and Preston, Alexander D. and Ma, Kaka and Nandwana, Peeyush},
abstractNote = {In this work, high-density WC-FeNi ceramic-metal (cermet) composites were fabricated using liquid-phase spark plasma sintering/field-assisted sintering technology (SPS/FAST) with in-situ formation of metal binder phase. The precursor materials were micron-sized powders of WC, Fe, Ni, and C. A low melting point from a eutectic reaction of the powders enabled the in-situ formation of FeNi alloy and facilitates liquid-phase sintering of the WC. The carbon powder was added to stabilize the formation of the binder phase. Electron backscatter diffraction (EBSD) was performed to measure grain size and orientation. The composite exhibited a 99% theoretical density and a microstructure consisting of rounded and contiguous WC grains. The average grain size is 10.5 μm. The composite has a maximum hardness of 16.1 GPa. This research provides a fast and cost-effective approach to fabricate hard metals.},
doi = {10.1016/j.ijrmhm.2020.105204},
journal = {International Journal of Refractory and Hard Metals},
number = C,
volume = 88,
place = {United States},
year = {2020},
month = {1}
}

Journal Article:
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This content will become publicly available on January 13, 2021
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