钼合金表面<strong>Si-ZrB<sub>2</sub>-Ti-Cr</strong>多元涂层的激光熔覆制备及高温抗氧化性能

doi:10.11902/1005.4537.2025.217

中国腐蚀与防护学报

2026, Vol. 46

Issue (1): 155-164 CSTR: 32134.14.1005.4537.2025.217 DOI: 10.11902/1005.4537.2025.217

增材制造与腐蚀专题

本期目录 | 过刊浏览

钼合金表面Si-ZrB₂-Ti-Cr多元涂层的激光熔覆制备及高温抗氧化性能

刘海龙¹, 王力¹(

), 赵卫国¹, 韩嘉彧¹, 王轻松¹, 龙佳怡¹, 贺星², 高黎黎¹, 王华³, 胡平¹(

)

^1.西安建筑科技大学冶金工程学院功能材料加工国家地方联合工程中心西安 710055
^2.中国科学院宁波材料技术与工程研究所海洋关键材料全国重点实验室宁波 315201
^3.西安精科华创材料分析检测有限公司西安 710599

Preparation and High-temperature Oxidation Resistance of Laser Clad Si-ZrB₂-Ti-Cr Multi-component Coatings on Mo-alloy

LIU Hailong¹, WANG Li¹(

), ZHAO Weiguo¹, HAN Jiayu¹, WANG Qingsong¹, LONG Jiayi¹, HE Xing², GAO Lili¹, WANG Hua³, HU Ping¹(

)

^1.National and Local Joint Engineering Research Center for Functional Materials Processing, School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
^2.State Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials, Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
^3.Xi'an Head Accurate Materials Testing Co. Ltd., Xi'an 710599, China

引用本文:

刘海龙, 王力, 赵卫国, 韩嘉彧, 王轻松, 龙佳怡, 贺星, 高黎黎, 王华, 胡平. 钼合金表面Si-ZrB₂-Ti-Cr多元涂层的激光熔覆制备及高温抗氧化性能[J]. 中国腐蚀与防护学报, 2026, 46(1): 155-164.
Hailong LIU, Li WANG, Weiguo ZHAO, Jiayu HAN, Qingsong WANG, Jiayi LONG, Xing HE, Lili GAO, Hua WANG, Ping HU. Preparation and High-temperature Oxidation Resistance of Laser Clad Si-ZrB₂-Ti-Cr Multi-component Coatings on Mo-alloy[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(1): 155-164.

全文: PDF(23660 KB) HTML

摘要:

钼合金具备高熔点、优良的导电导热性能和卓越的高温力学性能，在航空航天、核能核电等行业高温服役环境下应用广泛。然而，钼合金在高温服役环境下极易发生氧化导致构件失效。本文基于激光熔覆工艺，在钼合金表面制备了Si-ZrB₂-Ti-Cr多元合金抗氧化涂层，并系统研究了不同激光功率对涂层组织、相组成及高温抗氧化性能的影响。结果表明，当激光功率为2000 W时，涂层以亚稳态Mo₅Si₃相为主，高温氧化过程中生成的MoO₃易挥发，且未完全形成稳定的MoSi₂相，抗氧化性能不足。当激光功率为3000 W时，涂层表面形成SiO₂、TiO₂、ZrO₂氧化膜，厚度约900 μm，在1200 ℃氧化温度下表现出最佳抗氧化性能。当激光功率提升至4500 W时，过高的热输入导致基体Mo熔融挥发并混入涂层，氧化过程中Mo生成MoO₃挥发，形成多孔结构，从而降低抗氧化性能。本研究为钼合金高温防护涂层的成分设计与工艺优化提供了参考。

关键词 ：钼合金, 激光熔覆, 涂层, MoSi₂, 抗氧化

Abstract：

Mo-alloys are widely used in high-temperature environments foraerospace, nuclear energy and nuclear power industries due to their high melting point, excellent electrical and thermal conductivity and outstanding high-temperature mechanical properties. However, Mo-alloys are very susceptible to oxidation and failure in high-temperature service environments. In this study, Si-ZrB₂-Ti-Cr multicomponent anti-oxidation coatings were fabricated on Mo-alloys via laser cladding, and the effect of laser power on themicrostructure, phase composition, and high-temperature oxidation resistance of the acquired coatings was systematically investigated. The results show that when the laser power for cladding is 2000 W, the main constituents of the coating is metastable Mo₅Si₃ phase rather than the stable MoSi₂ phase, the metastable Mo₅Si₃ phase tens to generate MoO₃ during high-temperature oxidation process, which is highly volatile,, thus the coating has poor oxidation resistance. When the laser power is 3000 W, the acquired coating is ~900 μm in thickness, which showed the best oxidation resistance at 1200 ^oC with formation of a dense oxide scale on surface composed of SiO₂, TiO₂, and ZrO₂. As the laser power was increased to 4500 W, the excessive heat input caused too much Mo to be incorporated into the coating from the substrate. During the oxidation process MoO₃ was prone to volatilize, making the oxide scale porous and loose, thereby reducing the oxidation resistance. These findings may provide a reference for further R & D of high-temperature protective coatings on Mo-alloys.

Key words： Mo-alloy laser cladding coating MoSi₂ oxidation resistance

收稿日期: 2025-07-08 32134.14.1005.4537.2025.217

ZTFLH:

TG174

基金资助:国家自然科学基金(52404410);国家自然科学基金(52374401);陕西省自然科学基金青年项目(2024JC-YBQN-0367);中国科协青年人才托举计划2023,陕西省三秦英才引进计划青年项目2023及陕西省重点研发计划(2024QCYKXJ-116)

通讯作者: 王力，E-mail：13269528303@163.com，研究方向为金属材料的腐蚀与防护;
胡平，E-mail：huping@xauat.edu.cn，研究方向为难熔金属粉末冶金

作者简介: 刘海龙，2000 年生，硕士研究生，研究方向为钼基合金表面抗氧化涂层制备。在本领域期刊发表学术论文1篇，申请国家发明专利1项。
王力，西安建筑科技大学冶金工程学院，副教授，硕士生导师，北京科技大学材料科学与工程专业博士。聚焦于增材制造金属腐蚀与防护研究。在Corrosion Science、JMST和Additive Manufacturing 等领域知名期刊发表学术论文40余篇，申请国家发明专利15项，参编《增材制造金属的腐蚀行为与机理》专著1 部，获中国腐蚀与防护学会科学技术一等奖2项、中国有色金属工业协会科学技术奖一等奖1 项，陕西省冶金科学技术一等奖1 项。担任Corrosion Communication、《中国腐蚀与防护学报》、《粉末冶金技术》等期刊青年编委。入选第九届中国科协青年人才托举工程、陕西省三秦英才引进计划青年人才，主持国家自然科学基金青年项目、陕西省自然科学基金青年项目、陕西省教育厅自然科学专项项目、西安市科学家+工程师首席科学家、高层次人才引进项目等。

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.217 或 https://www.jcscp.org/CN/Y2026/V46/I1/155

图1 混合粉末的形貌及EDS面扫能谱结果

图2 不同激光功率下涂层的宏观形貌

图3 不同激光功率下涂层截面的微观形貌

图4 激光功率为2000 W时涂层截面的形貌及能谱结果

图5 激光功率为3000 W时涂层截面形貌及能谱结果

图6 激光功率为4500 W时涂层截面形貌及能谱结果

图7 不同激光功率制备的涂层表面XRD图谱

图8 不同激光功率制备的涂层氧化后的宏观形貌

图9 涂层样品经氧化后截面EDS能谱结果

图10 不同功率下涂层的氧化机理图

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