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首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanically Assisted Solid-State Mixing and Spark Plasma Sintering for Fabrication of Bulk Nanocomposite (WC/7(10Co/4Cr))-Based ZrO2 Systems
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Mechanically Assisted Solid-State Mixing and Spark Plasma Sintering for Fabrication of Bulk Nanocomposite (WC/7(10Co/4Cr))-Based ZrO2 Systems

机译：用于制备块状纳米复合材料（WC / 7（10Co / 4Cr））的Zro2系统的机械辅助固态混合和火花等离子体烧结

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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 A degrees 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 (similar to 0.29).
机译：使用高能球磨技术机械诱导的固态混合，用于制备WC / 7重量％（10cr / 4cr）固溶体粉末。 将50小时磨削后得到的固溶体粉末与（ZrO 2 + 1.5重量％）粉末一起用小重量级分（0-7重量％）。 然后使用火花等离子体烧结，在1250℃下在30MPa的单轴压力下真空固化粉末。 在该固结步骤之后，固结的散装样品几乎完全致密，并保持其纳米晶体结构。 结果表明，由于其纳米晶体结构，整个ZrO2浓度范围（0-7重量％）的固结样品对杨氏模量（297-318GPa）的较低值。 此外，WC / 7重量％（10CR / 4Cr）/ 7（ZrO 2-1.5摩尔％Y2O3）显示出优异的耐磨性，其低值摩擦系数（类似于0.29）。

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