Effect of ZrO2 Additives on the Nanomechanical Properties of Spark Plasma Sintered 93WC/7-xCo/xZrO2-2mol% Y2O3 Powders Prepared by High-Energy Ball Milling

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A high-energy ball milling technique was employed to prepare ultrafine cemented carbide nanocomposite powders with compositions (wt.%) of 93WC/7-xCo/xZrO2-2mol% Y2O3 powders (x=0, 1, 2, 3, 4, 5, 6, 7 wt%). The nanocomposite powders obtained after 75 h of ball milling possessed excellent morphological characteristics with spherical morphology and an average particle size of 150 nm in diameter. The powder of the end-productswere then consolidated in vacuum under a uniaxial pressure of 30 MPa at 1250 °C using spark plasma sintering. The fully dense nanocomposite bulk samples obtained via the SPS process maintain their nanocrystalline structure.The indentation fracture toughness (Kc1) of the bulk consolidated were investigated as a function of ZrO2 content.

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Journal: TechConnect Briefs
Volume: 1, Advanced Materials: TechConnect Briefs 2015
Published: June 14, 2015
Pages: 388 - 391
Industry sector: Advanced Materials & Manufacturing
Topic: Composite Materials
ISBN: 978-1-4987-4727-1