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Journal of Materials Engineering and Performance

Published in:

01-03-2017

Mechanically Assisted Solid-State Mixing and Spark Plasma Sintering for Fabrication of Bulk Nanocomposite (WC/7(10Co/4Cr))-Based ZrO₂ Systems

Authors: M. Sherif El-Eskandarany, Abdulsalam Al-Hazza, L. A. Al-Hajji

Published in: Journal of Materials Engineering and Performance | Issue 4/2017

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Abstract

Mechanically induced solid-state mixing, using high-energy ball milling technique, was employed for preparing WC/7 wt.% (10Cr/4Cr) solid-solution powders. The solid-solution powders obtained after 50 h of milling were mechanically mixed for 50 h together with small weight fractions (0-7 wt.%) of (ZrO₂ + 1.5 wt.% Y₂O₃) powders. The powders were then consolidated in vacuum under a uniaxial pressure of 30 MPa at 1250 °C, using spark plasma sintering. The consolidated bulk samples were nearly full dense and maintained their nanocrystalline structure after this consolidation step. The results showed that the consolidated samples over the entire range of ZrO₂ concentrations (0–7 wt.%) had low values for Young’s modulus (297–318 GPa) due to their nanocrystalline structures. Moreover, the WC/7 wt.% (10Cr/4Cr)/7(ZrO₂-1.5 mol.% Y₂O₃) showed excellent wear resistance, indexed by its low-value friction coefficient (~0.29).

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Title: Mechanically Assisted Solid-State Mixing and Spark Plasma Sintering for Fabrication of Bulk Nanocomposite (WC/7(10Co/4Cr))-Based ZrO2 Systems
Authors: M. Sherif El-Eskandarany
Abdulsalam Al-Hazza
L. A. Al-Hajji
Publication date: 01-03-2017
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 4/2017
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-017-2580-3

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