| 摘要: |
| 以Ti+B4C为反应药芯、Al为外皮材料制备反应型喷涂丝材，探讨利用自反应电弧喷涂技术在45钢基体表面制备复相陶瓷涂层的可行性。以X射线衍射仪(XRD)、扫描电子显微镜(SEM)和能谱仪(EDS)等方法分析、观察了涂层的组织与结构，测试了涂层的主要力学性能。结果表明：利用制备的药芯丝材进行喷涂试验，可获得由TiB2、TiB、TiC0.3N0.7、TiN、Al2O3、AlN等多相组成的复相陶瓷涂层。涂层呈典型的层状结构，其连续的基体相内弥散分布着离散的第二、第三相。涂层与基体间的结合强度为18.9 MPa，涂层的平均显微硬度与弹性模量分别为735.4 HV0.2和461.4 GPa，摩擦因数在0.45~0.50之间，耐磨性能较基体材料提高3倍以上。 |
| 关键词: 自反应电弧喷涂 Ti(C,N)-TiB2-Al2O3 复相陶瓷涂层 力学性能 |
| DOI： |
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| 基金项目:国家自然科学基金(51001118)； 再制造技术重点实验室基金(9140C850202120C85292) |
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| In-situ Synthesized Ti(C,N)-TiB2-Al2O3 Multi-plased Ceramic Coatings Prepared by Self-reactive Arc Spray Technology |
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LIU Hong-wei, ZHU Sheng, SUN Xiao-feng, QIU Ji
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Science and Techonolofy on Remanufacturing Laboratory, Academy of Armored Force Engineering, Beijing 100072
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| Abstract: |
| Reactive cored wires were prepared with Ti+B4C as reactive core and Al as strips. The feasibility of preparing multi-phased ceramic coatings on the surface of 45 steel through the self-reactive arc spray technology was discussed. Composition and microstructure of the coatings were analyzed and observed by X-ray diffraction analysis(XRD), scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS). The main mechanical properties of the coatings were tested. It was shown that multi-phased ceramic coatings composed of TiB2, TiB, TiC0.3N0.7, TiN, Al2O3 and AlN can be prepared by self-reactive arc spraying with the reactive cored wires. The coatings present the typical layer microstructure. The discrete second and third phases are dispersively distributed in the continuous base phase. The binding strength between the coating and the substrate is 18.9 MPa. The average microhardness and elastic modulus of the coatings are 735.4 HV0.2 and 461.4 GPa respectively. The friction coefficient is about 0.45-0.50, and the abrasion resistance increases more than 3 times of the substrate. |
| Key words: self-reactive arc spray Ti(C,N)-TiB2-Al2O3 multi-phased ceramic coatings mechanical performance |
