In-field reparation of the damaged coatings for C/C composites

Wang, Kewei; Luo, Lei; Lu, Yongxin; Yang, Juan; Wang, Yiguang

doi:10.1016/j.ceramint.2015.02.078

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…Aiming at achieving antioxidation of C/C brake discs, we previously prepared an PSN/borosilicate glass-B 4 C coating and realized effective oxidation resistance between 700 and 900 • C [20]. However, borosilicate glass does not start to soften until 650-680 • C, thus, making it difficult for the single borosilicate glass coating to provide oxidation resistance below 650 • C. Therefore, the on-site repair coating with a single softening temperature range cannot suit the anti-oxidation requirements during the temperature rise [21,22]. To achieve a long-term oxidation protection effect for the repair coating in a full-temperature range (500-900 • C), constituents with lower softening temperatures must be contained in the glass coating.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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.

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Section: Introductionmentioning

confidence: 99%