The possibility of increasing the strength characteristics of ceramics by introducing a ceramic-forming polymer polydimethylsilane into the charge is considered. When polydimethylsilane is introduced into the composition in the presence of a catalyst of molybdenum chloride, the transition of polydimethylsilane to polycarbosilane is observed, followed by the transition of the latter to silicon carbide. It is shown that the introduction of this additive at a mass content of more than 4% leads to an increase in strength characteristics, a decrease in open porosity.
1. Yajima S., Hasegawa Y., Okamura K., Matsuzawa T. Devel-opment of high tensile strength silicon carbide fiber using an organosilicon polymer precursor // Nature. 1978. N 273.
P. 525? 527.
2. Ly HQ, Taylor R, Day J. Conversion of polycarbosilane (PCS) to SiC-based ceramic. Part I. Characterization of PCS and Curing product // Mater. Sci. 2011. N 36.R. 4037? 4043.
3. Frazer D., Abad MD, Krumwiede D. et al. Localized me-chanical property assessment of SiC / SiC composite materials // Composites. Pt A: Applied Science and Manufacturing. 2015. N 70. P. 93? 101.
4. Shimoo T., Tsukada I., Narisawa M. et al. Change in Proper-ties of Polycarbosilane-Derived SiC Fibers at High Tempera-tures // J. Ceram. Soc. Jpn. 1997. N 110. P. 559? 563.
5. Chukhlanov V. Yu., Sysoev EP, Tereshina EN Heat-Insulating Materials Based on Ceramic-Forming Organosilicon Binder // Syntact Glass and Ceramics. 2005.
N 5? 6.P. 145? 147.
6. Chukhlanov V. Yu., Selivanov OG, Pikalov ES, Chukhlanova NV Method of obtaining heat-resistant ceramics of increased strength. An application for an invention
? 2017115517 dated 05/02/2017.
7. Chun-man Z., Li Xiao-dong, Hao W., Bin Z. Thermal stabil-ity and curing kinetics of polycarbosilane fibers // Trans. Non-ferrous Met. Soc. 2006. N 10.P. 44? 48.
8. Chukhlanov V. Yu. Et al. Increase of dielectric characteristics of ceramics in the centimeter microwave range by structural modification of pyrogenic silicon dioxide nanoparticles / V. Yu. Chukhlanov, OG Selivanov, E. P. Sysoev, E S. Pikalov, N. V. Chukhlanova // Glass and Ceramics. 2016.? 7, p. 12? 14.
? Chukhlanov V. Yu. et al. Enhancement of the Dielectric Properties of Ceramic in the Centimeter Microwave Range by Structural Modification of Pyrogenic Silicon Dioxide by Na-noparticles / V. Yu. Chukhlanov, OG Selivanov
,? .P. Sysoev, ES Pikalov, NV Chukhlanova // Glass and Ceram. 2016. N 7? 8.P. 149? 167.?
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