非晶-结晶法制备的 WC-Co 复合材料的微结构演化和增韧机理

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2024-12-01 DOI:10.1080/21663831.2024.2405085

Maobao Xu, Haibin Wang, Xuemei Liu, Hao Lu, Xiaoyan Song

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引用次数: 0

摘要

本研究探讨了非晶-结晶法制备的 WC-Co 复合材料的增韧问题。通过非晶 Co2W4C 粉末的结晶及其与碳的原位反应，富 Co 纳米颗粒（一种 Co（W，C）固溶体）被加入到 WC 基体中。我们详细研究了陶瓷-金属复合材料在制造过程中的微观结构演变。由于富钴纳米粒子与碳化钨基体之间的相互作用，以及碳化钨晶粒内部的位错和堆积断层，复合材料表现出了高硬度、高强度和优异的断裂韧性。研究揭示了该复合材料机械性能协同改善的机制。

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Microstructural evolution and toughening mechanism of WC-Co composite prepared by amorphous-crystallization method

In this study, toughening of WC-Co composite prepared by amorphous-crystallization method was investigated. Co-rich nanoparticles, a Co(W,C) solid solution, were incorporated into the WC matrix through the process integrating crystallization of amorphous Co₂W₄C powder and its in-situ reaction with carbon. The microstructural evolution of the ceramic-metal composite during fabrication was studied in detail. Owing to the interactions between Co-rich nanoparticles coherent with the WC matrix and the dislocations and stacking faults inside WC grains, the composite exhibited high hardness and strength combined with exceptional fracture toughness. The mechanisms for the synergistic improvement of mechanical properties of the composite were disclosed.

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.