{"title":"Effect of V2AlC on the microstructure of copper/graphite composite materials","authors":"Y. Gong , S. Wang","doi":"10.1016/j.vacuum.2025.114113","DOIUrl":null,"url":null,"abstract":"<div><div>Copper/graphite composite materials (CGCM) are widely employed as electric contact material in many fields. However, challenges persist due to weak interface bonding. This study investigates the incorporation of V<sub>2</sub>AlC into CGCM to enhance the bonding at the copper-graphite interface. The results show that at high temperatures, V<sub>2</sub>AlC decomposes in situ into VC, releasing V atoms that promote the synthesis of a VC layer at the copper-graphite interface. This contributes to a higher nano-indentation hardness at the copper-graphite interface, from 1.46 ± 0.16 GPa to 6.12 ± 0.48 GPa. Additionally, there is a significant improvement in the hardness and compressive strength of CGCM, with hardness increasing from 19.6 ± 1.2 HV<sub>0.2</sub> to 76.3 ± 1.6 HV<sub>0.2</sub> and compressive strength rising from 132 ± 5 MPa to 218 ± 6 MPa, respectively.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"234 ","pages":"Article 114113"},"PeriodicalIF":3.9000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X25001034","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/6 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Copper/graphite composite materials (CGCM) are widely employed as electric contact material in many fields. However, challenges persist due to weak interface bonding. This study investigates the incorporation of V2AlC into CGCM to enhance the bonding at the copper-graphite interface. The results show that at high temperatures, V2AlC decomposes in situ into VC, releasing V atoms that promote the synthesis of a VC layer at the copper-graphite interface. This contributes to a higher nano-indentation hardness at the copper-graphite interface, from 1.46 ± 0.16 GPa to 6.12 ± 0.48 GPa. Additionally, there is a significant improvement in the hardness and compressive strength of CGCM, with hardness increasing from 19.6 ± 1.2 HV0.2 to 76.3 ± 1.6 HV0.2 and compressive strength rising from 132 ± 5 MPa to 218 ± 6 MPa, respectively.
期刊介绍：
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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