不锈钢表面溶胶-凝胶/微胶囊复合膜层的研究

介绍了用溶胶-凝胶/微胶囊的手段制备复合涂层的方法,具体讨论了将有机硅树脂以微胶囊的方式加入到氧化锆溶胶-凝胶中,并使微胶囊包封技术应用于表面复合膜层的制备.试验结果表明,制得的氧化锆溶胶-凝胶/微胶囊复合涂层具有良好的抗高温氧化性能和耐腐蚀性能.对其机理的分析认为,由于微胶囊在高温氧化过程中囊皮破裂,使得胶囊内的流体得以填平由于氧化锆膜层与基体膨胀系数不同而造成的裂纹.

Study of Sol-gel/Microcapsule Compound Coating on Stainless Steel

A method for applying compound coating using a sol gel/microcapsule method is described. Orhanosilicon resin having been made into microcapsule was added to zirconia sol. The microcapsulation technique was applied to the preparation of compound coatings. Through a lot of experiments and tests, a kind of sol gel/microcapsule compound coating which has good performances of high temperature oxidation resistance and corrosion resistance has been attained. The mechanism of its good performances is that some slight crackles come into being on the skin of microcapsules in the process of high temperature oxidation, the liquid in the core could flow out to fill and level up the cracks caused by the difference in the expansion coefficient between zirconia and stainless steel substrate.