【摘要】 研制了一种以磷酸、磷酸盐、硼化物等为原材料的磷酸盐涂料,在不同温度下烧结处理后,对其抗氧化性能及表面微观形貌进行研究。结果表明:650℃烧结的涂层氧化防护性能明显优于900℃烧结的;在700℃氧化30h后,最小氧化失重率仅为1.76%,氧化后涂层仍然保持完整致密;经过900℃、3min室温、2min循环30次和1100℃、3min室温、2min循环10次的连续热震后,失重率为1.97%,涂层与C/C基体结合良好,涂层的热性能稳定。更多还原

【Abstract】 A kind of phosphatic coating used for carbon-carbon composites aircraft brakes was made from phosphoric acid,phosphate,boride and so on and treated at diffirent temperature.The properties of anti-oxidation and morphologies of coatings were studied at once.Results show that anti-oxidation properties of caotings treated at 650℃ were obviously higher than those treated at 900℃.The minimum weight loss was only 1.76% at 700℃ for 30 h in atmosphere.The surface of coating after oxidation was perfect and dense.Moreover,the weight loss percent of thermal shock circulated in air from 900℃ for 3 min to room temperature for 2 min for 30 times and from 1 100℃ for 3 min to room temperature for 2 min for 10 times was 1.97%.This indicates that the phosphatic coating can provide excellent anti-oxidation properties and thermal shock resistance properties.更多还原