料浆法聚乙烯醇缩丁醛添加量对钼合金硅化物涂层微观结构及抗氧化性能的影响

doi:10.11902/1005.4537.2025.054

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1717-1724 CSTR: 32134.14.1005.4537.2025.054 DOI: 10.11902/1005.4537.2025.054

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料浆法聚乙烯醇缩丁醛添加量对钼合金硅化物涂层微观结构及抗氧化性能的影响

龙佳怡¹, 王力¹(

), 赵卫国¹, 韩嘉彧¹, 王轻松¹, 刘海龙¹, 高黎黎¹, 胡平¹(

), 冯鹏发²

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 金堆城钼业股份有限公司西安 710077

Effect of PVB Addition on Microstructure and Oxidation Resistance of Silicide Coatings on TZM Mo-alloy by Slurry Method

LONG Jiayi¹, WANG Li¹(

), ZHAO Weiguo¹, HAN Jiayu¹, WANG Qingsong¹, LIU Hailong¹, GAO Lili¹, HU Ping¹(

), FENG Pengfa²

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 Jinduicheng Molybdenum Industry Co. Ltd. , Xi'an 710077, China

引用本文:

龙佳怡, 王力, 赵卫国, 韩嘉彧, 王轻松, 刘海龙, 高黎黎, 胡平, 冯鹏发. 料浆法聚乙烯醇缩丁醛添加量对钼合金硅化物涂层微观结构及抗氧化性能的影响[J]. 中国腐蚀与防护学报, 2025, 45(6): 1717-1724.
Jiayi LONG, Li WANG, Weiguo ZHAO, Jiayu HAN, Qingsong WANG, Hailong LIU, Lili GAO, Ping HU, Pengfa FENG. Effect of PVB Addition on Microstructure and Oxidation Resistance of Silicide Coatings on TZM Mo-alloy by Slurry Method[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1717-1724.

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摘要:

采用料浆烧结法在TZM (Ti-Zr-Mo)合金表面制备不同含量粘结剂的硅化物涂层，采用扫描电镜、X射线衍射仪研究不同粘结剂含量涂层微观结构及物相组成，进而探究了涂层高温抗氧化性能。结果表明，在聚乙烯醇缩丁醛(PVB)含量(质量分数)低于10%时，随着PVB含量的提高，裂纹数目减少且宽度减小，氧化失重相对较少；但在当PVB含量高于10%时，裂纹和失重情况并无明显改善；PVB含量在10%情况下达到最优效果。随着氧化持续进行，Si元素持续贫化导致涂层最终失效。

关键词 ：钼合金, 料浆法, PVB粘结剂, 硅化物涂层, 抗氧化性能

Abstract：

Silicide coating is often used as the main component of oxidation resistance coating on Mo-alloy due to the formation of SiO₂ glass phase during high temperature service. At present, slurry method is widely used to prepare silicide coating on Mo-alloy surface due to easy operation and no-need for large equipment. However, the binder content in slurry method and its effect on the microstructure and oxidation resistance of the coating are still unclear. In this paper, silicide coatings with different binder contents were prepared on TZM Mo-alloy surface by slurry sintering method. The microstructure and phase composition of silicide coatings prepared with different binder PVB contents were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and then the oxidation resistance of Mo-alloy with coating was examined in air at 1000, 1100 and 1200 ^oC for 1 h respectively. The results showed that with the increase of PVB content in the range of 2% to 10%, the number and width of cracks of the prepared coatings decreased, correspondingly the weight loss of the coatings induced by high temperature oxidation is alleviated. However, when the PVB content exceeds than 10%, there is no significant improvement in crack formation and the weight loss. In summary, the optimal effect is achieved when the PVB content is 10%.

Key words： molybdenum alloy slurry method PVB binder silicide coating oxidation resistance

收稿日期: 2025-02-19 32134.14.1005.4537.2025.054

ZTFLH:

TG174

基金资助:国家自然科学基金(52404410);国家自然科学基金(52374401);国家自然科学基金(52404409);陕西省自然科学基础研究计划(2024JC-YBQN-0367);陕西省重点研发计划(2024QCYKXJ-116);陕西省教育厅科学研究计划项目一般专项(24JK0515);西安市科技计划(24ZDCYJSGG0043)

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以及其服役研究胡平，E-mail：huping@xauat.edu.cn，研究方向为粉末冶金、材料加工

Corresponding author: WANG Li, E-mail: 13269528303@163.comHU Ping, E-mail: huping@xauat.edu.cn

作者简介: 龙佳怡，女，2002年生，硕士生

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	龙佳怡
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	胡平
	冯鹏发
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https://www.jcscp.org/CN/10.11902/1005.4537.2025.054 或 https://www.jcscp.org/CN/Y2025/V45/I6/1717

图1 不同PVB含量的浆料所制备涂层的表面微观形貌

图2 PVB含量不同的浆料所制备涂层的截面微观形貌

图3 PVB含量不同的浆料所制备涂层在1000 ℃下氧化后的成分分析

图4 含10%PVB浆料所制备涂层1000 ℃下氧化前后XPS结果分析

图5 PVB含量不同的浆料所制备涂层在不同温度下氧化1 h后的失重

图6 PVB含量为2%、10%和20%浆料所制备涂层在1000 ℃下氧化前后的XRD谱图

图7 PVB含量不同的浆料所制备的涂层中Si和Mn含量及其1000 ℃下氧化1 h的失重

图8 PVB对硅化物涂层氧化行为影响机理图

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