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一种用于C/C刹车材料的有效抗氧化修复涂层，其包含铅硼硅酸盐和铋硼硅酸盐玻璃。

Effective Anti-Oxidation Repair Coating for C/C Brake Materials Comprising Lead-Borosilicate and Bismuth-Borosilicate Glass.

作者信息

Deng Mengjia, Xia Xiaoyu, Deng Juanli, Hu Kaiyue, Luan Chenghua, Ma Xu, Fan Shangwu, Wang Peng

机构信息

School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.

Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, P.za Leonardo Da Vinci 32, 20133 Milano, Italy.

出版信息

Materials (Basel). 2022 Apr 12;15(8):2827. doi: 10.3390/ma15082827.

DOI:10.3390/ma15082827
PMID:35454519
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9029442/
Abstract

To achieve effective antioxidation of on-site repair coating for C/C brake materials in the full temperature range (500-900 °C), lead glass and bismuth glass were introduced into the borosilicate glass to acquire the protective coatings. Before preparing coating samples, the thermal gravity characteristics of the lead/bismuth-borosilicate glass powders were analyzed by TG/DSC. The results revealed that the temperature at which weight gain begins was 495 °C and 545 °C, respectively. The oxidation behaviors of the lead- and bismuth-modified borosilicate glass coatings were compared at 500 °C, and the antioxidation properties of the former were further examined from 500 to 900 °C. The oxidation results indicated that mixing lead glass with borosilicate glass realized effective oxidation resistance in the full temperature range. With a lead content of 20%, the lead-borosilicate glass coating was able to protect C/C substrates from oxidation. The corresponding weight loss of the lead-glass-coated samples was -1.89% when oxidized at 500 °C for 10 h, while the weight loss was -2.55% when further oxidized at 900 °C for 10 h. However, mixing bismuth glass with borosilicate glass was difficult to achieve the oxidation resistance of the coating at 500 °C due to the significant phase separation.

摘要

为了使C/C刹车材料的现场修复涂层在全温度范围（500-900℃）内实现有效的抗氧化，将铅玻璃和铋玻璃引入硼硅酸盐玻璃中以获得保护涂层。在制备涂层样品之前，通过TG/DSC分析了铅/铋-硼硅酸盐玻璃粉末的热重特性。结果表明，增重开始的温度分别为495℃和545℃。在500℃下比较了铅和铋改性硼硅酸盐玻璃涂层的氧化行为，并在500至900℃范围内进一步研究了前者的抗氧化性能。氧化结果表明，将铅玻璃与硼硅酸盐玻璃混合可在全温度范围内实现有效的抗氧化。当铅含量为20%时，铅-硼硅酸盐玻璃涂层能够保护C/C基体不被氧化。在500℃下氧化10小时后，涂覆铅玻璃的样品的相应重量损失为-1.89%，而在900℃下进一步氧化10小时后，重量损失为-2.55%。然而，由于显著的相分离，将铋玻璃与硼硅酸盐玻璃混合很难在500℃下实现涂层的抗氧化性。

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