Microstructure, Mechanical Property, and Linear Expansion Coefficient of ZrO2@Diamond/2024 Composite

IF 3.4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Engineering Materials Pub Date : 2025-03-20 DOI:10.1002/adem.202403000

Bin Li, Xiaochen Liu, Xiaoqing Zuo, Jianhong Yi

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引用次数: 0

Abstract

This study investigates the preparation and properties of diamond/2024 composites with a diamond content of 15 vol% and ZrO₂-coated diamond/2024 composites (ZrO₂@diamond/2024). ZrO₂ is coated onto diamond particles using evaporation crystallization, and the effects of different thermal decomposition temperatures and durations on the coating are examined. The results show that a smooth and uniform ZrO₂ coating is achieved at a thermal decomposition temperature of 600 °C with a holding time of 2 h. In diamond/2024 composites, noticeable voids are observed at the interface, while the ZrO₂@diamond/2024 composites exhibit a flat, well-bonded interface without cracks, voids, or Al₄C₃ formation. The ZrO₂ coating effectively prevents direct contact between diamond and aluminum melt, inhibiting Al₄C₃ formation, which leads to a tensile strength increase of ZrO₂@diamond/2024 composites to 200.1 MPa, 10.8% higher than the uncoated composites. Additionally, the linear expansion coefficient and dimensional change rate of ZrO₂@diamond/2024 composites are lower than those of diamond/2024 composites, indicating better interface bonding and thermal expansion constraint.

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ZrO2@Diamond/2024复合材料的显微组织、力学性能及线膨胀系数

本文研究了金刚石含量为15 vol%的金刚石/2024复合材料和zro2涂层金刚石/2024复合材料（ZrO2@diamond/2024）的制备和性能。采用蒸发结晶法将ZrO2包覆在金刚石颗粒上，考察了不同的热分解温度和时间对包覆效果的影响。结果表明：在热分解温度为600℃、保温时间为2 h的条件下，获得了光滑均匀的ZrO2涂层；在金刚石/2024复合材料中，在界面处观察到明显的空洞，而ZrO2@diamond/2024复合材料表现出平坦、结合良好的界面，没有裂纹、空洞或Al4C3的形成。ZrO2涂层有效地阻止了金刚石与铝熔体的直接接触，抑制了Al4C3的形成，使ZrO2@diamond/2024复合材料的抗拉强度提高到200.1 MPa，比未涂层复合材料提高了10.8%。此外，ZrO2@diamond/2024复合材料的线性膨胀系数和尺寸变化率均低于金刚石/2024复合材料，表明其界面结合和热膨胀约束性能较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Engineering Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

5.60%

发文量

544

审稿时长

1.7 months

期刊介绍： Advanced Engineering Materials is the membership journal of three leading European Materials Societies - German Materials Society/DGM, - French Materials Society/SF2M, - Swiss Materials Federation/SVMT.