Materials Reports  2021, Vol. 35 Issue (z2): 86-89 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
| Effects of CVD BN Coatings on Flexural Properties of Si3N4/SiBN Composites by Precursor Infiltration Pyrolysis |
| MA Xin1,2, QIU Haipeng1,2, LIANG Yanyuan1,2, LIU Shanhua1,2, WANG Xiaomeng1,2, ZHAO Yuliang1,2, CHEN Mingwei1,2, XIE Weijie1,2
|
1 AVIC Composite Technology Center, AVIC Manufacturing Technology Institute, Beijing 101300, China
2 National Key Laboratory of Advanced Composites, Beijing 101300, China |
|
|
|
|
Abstract Continuous Si3N4 ceramic fiber is the candidate as reinforcement in the ceramic matrix composites for high temperature microwave transpa-rent application own to its high thermal stability, mechanical and dielectric properties. Continuous Si3N4 ceramic fiber reinforced SiBN ceramic matrix composites were prepared by precursor infiltration pyrolysis (PIP). The effects of CVD BN on the flexural properties of Si3N4/SiBN composites were investigated. The results show a uniform and dense BN coating was obtained. The BN-coated Si3N4/SiBN composites exhibits toughness fracture characteristic own the fine interfacial bonding between fiber and matrix. When the thickness of BN coating is 200 nm, the fle-xural strength and fracture toughness of the Si3N4/SiBN composites were 182.3 MPa and 17.3 MPa·m1/2 respectively, which are 59.6% and 94.4% higher than those of the uncoated composites.
|
|
Published: 09 December 2021
|
|
|
| Fund:This work was financially supported by Equipment Pre-Research Field Foundation of China (61409220208), National Defense Basic Scientific Research program of China (JCKYS2019213013) |
About author:: Xin Ma received his Ph.D. degree in materials science and engineering from the University of Science and Technology Beijing (USTB), and is currently a senior engineer of the AVIC Composite Technology Center. His research interests focus on the advanced thermal wave-transmit composites with national research priority, and the fundamental theory & application about the advanced processing and microstructure & property control. He has successively presided over six national projects, and published more than 10 journal papers, as well as applied 6 invention patents have been authorized and applied.
Haipeng Qiu, Ph.D., researcher, and is currently the director of the ultra-high temperature composites research office in AVIC Composite Technology Center. He is the chief expert, first-class expert of AVIC, director of China Silicate branch and testing technology branch, as well as executive director of Beijing Branch of SAMPE. He is engaged in ceramic and carbon based composite material research and development. He has won the group's science and technology progress award four times and third prize four times, authorized 20 national patents and published more than 100 academic papers. |
|
|
1 Gongjin Q, Changrui Z, Haifeng H. Journal of Non-Crystalline Solids, 2006, 352, 3794.
2 Bin L, Kun L, Changrui Z, Siqing W. Journal of the European Ceramic Society, 2014, 34, 3591.
3 Yu Z, Shubin W. Applied Surface Science, 2012, 258, 4698.
4 Cooke F. Journal of the American Ceramic Society, 1991, 74, 2959.
5 Duan L, Changrui Z, Bin L, et al.Materials Letters, 2012, 68, 222.
6 Riedel R, Kienzle A, Dressler W, Ruwisch L, Bill J, Aldinger F. Nature, 1996, 382, 796.
7 Liu C, Liu B, Shao YL et al.Journal of the American Ceramic Society, 2007, 90(11),3690. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
