中国激光, 2017, 44 (10): 1003002, 网络出版: 2017-10-18
基于激光裂解含Ti粉聚二甲基硅氧烷的SiTiOC复相陶瓷涂层制备 下载: 765次
Fabrication of SiTiOC Multiphase Ceramic Coating Based on Laser Pyrolyzing of Polydimethylsiloxane with Titanium Powder
材料 复相陶瓷涂层 激光裂解 聚二甲基硅氧烷先驱体 Ti粉 materials multiphase ceramic coating laser pyrolysis polydimethylsiloxane precursor titanium powder
摘要
通过激光裂解含Ti粉聚二甲基硅氧烷先驱体, 制备了陶瓷涂层, 并分析了裂解产物的组成与结构。结果表明, 在高能激光作用下, Ti粉与聚二甲基硅氧烷发生自由基反应, 生成由晶态的SiC、TiC、TiO2和非晶态SiO2、单质C、C6H18OSi2组成的复相陶瓷涂层。新生的TiO2和TiC陶瓷相能填补陶瓷涂层的孔隙, 使涂层表面平整, 孔隙减少。金属Ti粉的加入还有利于降低复相陶瓷涂层中自由碳的质量分数, 当添加的Ti粉质量分数为5.0 %时, 涂层中Si、O和C元素质量分数分别达到74.44%、16.48%和6.19%。
Abstract
The ceramic coating is fabricated by laser pyrolyzing of polydimethylsiloxane precursors with titanium powder, and the compositions and structures of the products are also analyzed. The results show that, under the action of a high energy laser, there is a free radical reaction between the titanium powder and the polydimethylsiloxane, and the fabricated multiphase ceramic coating is composed of the crystalline-state SiC, TiC, TiO2 and the amorphous-state SiO2, elemental C, C6H18OSi2. The newly formed TiO2 and TiC ceramic phases can fill the pore of the ceramic coating, which makes the coating surface uniform and dense and the pore number reduced. The addition of metallic titanium powder is also conductive to reducing the mass fraction of free carbons in the multiphase ceramic coating. When the mass fraction of the titanium powder is 5.0%, the mass fractions of Si, O and C element in the coating are 74.44%, 16.48% and 6.19%, respectively.
赵吉鑫, 乔玉林, 薛胤昌, 黄克宁. 基于激光裂解含Ti粉聚二甲基硅氧烷的SiTiOC复相陶瓷涂层制备[J]. 中国激光, 2017, 44(10): 1003002. Zhao Jixin, Qiao Yulin, Xue Yinchang, Huang Kening. Fabrication of SiTiOC Multiphase Ceramic Coating Based on Laser Pyrolyzing of Polydimethylsiloxane with Titanium Powder[J]. Chinese Journal of Lasers, 2017, 44(10): 1003002.