Ceramic coatings prepared by laser pyrolysis of polysiloxane modified by titanate

QIAO Yulin; ZHAO Jixin; XUE Yinchang; LIANG Xiubing

doi:10.7510/jgjs.issn.1001-3806.2018.02.015

LASER TECHNOLOGY > 2018 > 42(2): 217-221. > DOI: 10.7510/jgjs.issn.1001-3806.2018.02.015

QIAO Yulin, ZHAO Jixin, XUE Yinchang, LIANG Xiubing. Ceramic coatings prepared by laser pyrolysis of polysiloxane modified by titanate[J]. LASER TECHNOLOGY, 2018, 42(2): 217-221. DOI: 10.7510/jgjs.issn.1001-3806.2018.02.015

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Ceramic coatings prepared by laser pyrolysis of polysiloxane modified by titanate

National Engineering Research Center for Mechanical Product Remanufacturing, Academy of Army Armored Force, Beijing 100072, China

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Received Date: May 15, 2017
Revised Date: June 12, 2017
Published Date: March 24, 2018

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Abstract

Abstract

In order to solve the problem that metallic powder active fillers were easily dispersed nonuniformly while preparing ceramic coatings by polymer derived ceramics method, the ceramic coating was prepared by laser pyrolysis of polydimethylsiloxane modified by butyl titanate. The composition and structure of products were analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results show that, while the mass fraction of the addition of butyl titanate is 0.05, the relative content of Ti element in different areas of coatings is about 3% and Ti element disperses uniformly in ceramic coating. Under the action of high energy laser, the ceramic coating generated from the polydimethylsiloxane modified by butyl titanate is composed of crystalline SiC and TiO₂, as long as amorphous SiO₂, (TiO₂)₅₆(SiO₂)₄₄ and C₆H₁₈OSi₂. The formation of new ceramic phase such as TiO₂ and (TiO₂)₅₆(SiO₂)₄₄ can fill the pores and lead to the less porosity of the ceramic coating, and make the coating surface uniform and densified. The study solves the dispersion of active filler of metal powder.
- materials,
- ceramic coating,
- laser pyrolysis,
- butyl titanate,
- polydimethylsiloxane precursor,
- pyrolysis mechanism

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