Microstructure and wear resistance of the CuSn19Ti10/diamond composite coatings on copper substrate by laser cladding

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-10-20 DOI:10.1016/j.diamond.2024.111667

Haozhen Huang , Can Huang , Lang Deng , Dmytro Turkevych , Hao Liu , Cheng Xie , Zhigang Shui , Xin Ming , Jian Tu , Donghua Yang , Xia Chang , Zhiming Zhou

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Abstract

Copper and its alloys are well-known for their excellent electrical and thermal conductivity but are limited by poor mechanical strength and wear resistance. In this study, CuSn19Ti10/diamond composite coatings with strong metallurgical bonding and free from defects such as cracks and porosity were successfully fabricated on pure copper substrates using laser cladding. The process parameters included a laser power of 3000 W, a scanning rate of 15 mm/s, a spot diameter of 2.5 mm, and a lapping rate of 30 %. A comprehensive analysis of the microstructure and wear resistance was performed on coatings with 0, 2.5 %, 5 %, and 10 % (wt%) diamond content using SEM, EDS, XRD, and white light interferometry. The results indicate that the coatings consist of α-(Cu), Cu₂SnTi, (Cu, Sn)Ti₂, TiC, and diamond phases. The addition of diamond significantly improved both the hardness and wear resistance, with the 5 wt% diamond composite demonstrating the most notable wear resistance. This optimal composition balances diamond content, ensuring effective retention within the CuSn19Ti10 matrix, thereby reducing plastic deformation and minimizing diamond pull-out during wear.

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通过激光熔覆铜基板上的 CuSn19Ti10/金刚石复合镀层的微观结构和耐磨性

众所周知，铜及其合金具有优异的导电性和导热性，但机械强度和耐磨性较差。在这项研究中，利用激光熔覆技术在纯铜基底上成功制造出了冶金结合力强、无裂纹和气孔等缺陷的 CuSn19Ti10/金刚石复合涂层。工艺参数包括：激光功率 3000 W，扫描速度 15 mm/s，光斑直径 2.5 mm，研磨率 30 %。使用 SEM、EDS、XRD 和白光干涉仪对金刚石含量分别为 0%、2.5%、5% 和 10%（重量百分比）的涂层的微观结构和耐磨性进行了全面分析。结果表明，涂层由 α-（Cu）、Cu2SnTi、（Cu, Sn）Ti2、TiC 和金刚石相组成。金刚石的加入大大提高了硬度和耐磨性，其中 5 wt%金刚石复合材料的耐磨性最为显著。这种最佳成分平衡了金刚石的含量，确保了金刚石在 CuSn19Ti10 基体中的有效保留，从而减少了塑性变形，最大程度地降低了磨损过程中金刚石的脱落。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.