摘要
采用超声感应加热法在H2O2水热处理C/C复合材料表面沉积了CaHPO4涂层,借助SEM、XRD、FTIR、EDS等手段,研究了衬底温度对涂层的微观结构的影响,并通过划痕测试评价涂层与C/C基体之间的结合强度,同时运用分析天平测量质量以研究涂层的沉积动力学。结果显示,所制得的CaHPO4涂层钙磷比为1.2左右,晶格中出现碳离子。涂层形貌无明显变化,但是伴随温度的升高,涂层致密度降低。涂层与基体之间的结合强度随温度升高而增强,但内聚强度随温度升高而减弱。CaHPO4涂层的感应加热沉积过程受表面化学反应控制,沉积活化能为46.7 kJ/mol。
CaHPO4 coatings were deposited on H202-treated carbon/carbon composites （HT-C/C） substrates at different suhstrate temperatures by a ultrasonic induction heating method. The microstructures of these coatings were characterized by SEM, XRD, FTIR and EDS, and the adhesion of them to the HT-C/C substrates was evaluated by a scratch test. Meantime, the deposition kinetics of the CaHPO4 coatings was analyzed by measuring their weights using an analytical balance. The results show that the CaHPO4 coatings have a Ca/P ratio of 1.2±0.05, and some carbonate ions are found in their lattice. These coatings show no obvious changes in the morphologies, but their compactness decreases with increasing the temperature. The adhesive strength of the coatings to HT-C/C increases but their cohesive strength decreases with increasing substrate temperature. The induction heating deposition process of these CaHPO4 coatings is controlled by surface chemical reaction and the deposition activation energy is 46.7 kJ/mol.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第7期1594-1599,共6页
Rare Metal Materials and Engineering
基金
the National Natural Science Foundation of China(51172147,50702034)
the Shenzhen Science and Technology Research(JC201005280437A)
关键词
涂层
碳
磷酸氢钙
划痕测试
感应加热沉积
coating
carbon
CaHPO4
scratch test
induction heating deposition
