李玉涛,李辉.Cf/SiC表面等离子喷涂金属过渡层及其界面结合特征[J].表面技术,2019,48(4):97-103.
LI Yu-tao,LI Hui.Plasma-sprayed Metallic Transition Coating on Cf/SiC Surface and Interface Bonding Characteristics[J].Surface Technology,2019,48(4):97-103 |
| Cf/SiC表面等离子喷涂金属过渡层及其界面结合特征 |
| Plasma-sprayed Metallic Transition Coating on Cf/SiC Surface and Interface Bonding Characteristics |
| 投稿时间：2018-10-14 修订日期：2019-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.014 |
| 中文关键词: 等离子喷涂 Cf/SiC复合材料 Mo-10wt.%Ti复合涂层 结合强度 热膨胀系数 润湿性 |
| 英文关键词:plasma spraying Cf/SiC composite Mo-10wt.%Ti composite coating bonding strength thermal expansion coefficient wettability |
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| 中文摘要: |
| 目的 采用等离子喷涂工艺（APS）在Cf/SiC复合材料表面制备金属涂层。方法 在对比等离子喷涂Mo粉、NiCrBSi粉以及自制的Ti70Ni20Cu10复合粉末三种涂层的组织形貌和界面结合的基础上，制备了Mo-10%Ti复合涂层，喷涂用粉为通过低速球磨方法在大颗粒的Mo粉表面包覆TiH2粉末而得，喷涂时将基体预热至700 ℃，在氩气保护气氛下进行喷涂。结果 APS制备的Mo-10Ti涂层，组织致密均匀，孔隙率较低，无明显裂纹。涂层与基体结合紧密，没有发生剥离现象，结合强度超过6.3 MPa，断裂发生于基体侧。结论 材料的热膨胀系数和润湿性是影响等离子喷涂金属涂层与Cf/SiC复合材料结合的关键因素，所设计的Mo-Ti复合涂层较好地兼顾了这两点。 |
| 英文摘要: |
| The work aims to prepare metallic coatings on Cf/SiC composite substrate by plasma spraying (APS). Based on the analysis of coating characteristics and interfacial bonding of the plasma sprayed Mo, NiCrBSi and in-house Ti70Ni20Cu10 composite powder, a Mo-10wt.%Ti composite coating was prepared. The composite powder subject to spraying was made by cladding large particle Mo powder with small TiH2 powder with a low-energy ball milling method. The substrate temperature was preheated to 700 ℃ during spraying, and the spraying was conducted under an argon atmosphere. The sprayed Mo-10Ti coating presented a dense and uniform microstructure, with low porosity and without obvious cracks. The coating was well bonded to the substrate without any peeling. The bonding strength of the coating exceeded 6.3 MPa, and fracture occurred at substrate. The thermal expansion coefficient and the wettability of the material are the key factors affecting the adhesion of plasma sprayed metallic coating on the Cf/SiC composite substrate. The designed Mo-Ti composite coating takes both two issues into account. |
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