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The improvement in thermal and mechanical properties of TiB2 modified adhesive through the polymer-derived-ceramic route

Luan, Xin’gang and Chang, Sen and Riedel, Ralf and Cheng, Laifei (2018):
The improvement in thermal and mechanical properties of TiB2 modified adhesive through the polymer-derived-ceramic route.
In: Ceramics international, Elsevier SCI LTD, Oxford, England, pp. 19505-19511, 44, (16), ISSN 0272-8842,
DOI: 10.1016/j.ceramint.2018.07.190,
[Online-Edition: https://www.sciencedirect.com/science/article/pii/S027288421...],
[Article]

Abstract

An air stable high temperature adhesive synthesized via the polymer-derived-ceramic route had received increased attention in the last two decades. To improve the thermal stability and adhesion strength of a polysilazane (PSNB) adhesive, TiB2 was added as active filler to join SiC ceramic discs. The thermal stability, phase composition and microstructure were investigated by using TGA, XRD, FT-IR, BSE and SEM measurements. Effects of the pyrolysis temperature and active filler TiB2 on the microstructure and adhesion strength have been investigated. After curing and heat-treating at 120 degrees C and 1000 degrees C in air for 2 h, respectively, the adhesion strength of the modified adhesive reached up to 10.07 MPa (3 times higher than that of pure PSNB) at room temperature, and, more importantly, retained a strength of 8.0 MPa at 800 degrees C in air. It should be noted that the formation of a glass comprised of SiO2-B2O3-TiO2 and the emergence of the hexagonal and granular TiB2 in the adhesive layer are mainly responsible for the enhanced high temperature strength.

Item Type: Article
Erschienen: 2018
Creators: Luan, Xin’gang and Chang, Sen and Riedel, Ralf and Cheng, Laifei
Title: The improvement in thermal and mechanical properties of TiB2 modified adhesive through the polymer-derived-ceramic route
Language: English
Abstract:

An air stable high temperature adhesive synthesized via the polymer-derived-ceramic route had received increased attention in the last two decades. To improve the thermal stability and adhesion strength of a polysilazane (PSNB) adhesive, TiB2 was added as active filler to join SiC ceramic discs. The thermal stability, phase composition and microstructure were investigated by using TGA, XRD, FT-IR, BSE and SEM measurements. Effects of the pyrolysis temperature and active filler TiB2 on the microstructure and adhesion strength have been investigated. After curing and heat-treating at 120 degrees C and 1000 degrees C in air for 2 h, respectively, the adhesion strength of the modified adhesive reached up to 10.07 MPa (3 times higher than that of pure PSNB) at room temperature, and, more importantly, retained a strength of 8.0 MPa at 800 degrees C in air. It should be noted that the formation of a glass comprised of SiO2-B2O3-TiO2 and the emergence of the hexagonal and granular TiB2 in the adhesive layer are mainly responsible for the enhanced high temperature strength.

Journal or Publication Title: Ceramics international
Volume: 44
Number: 16
Publisher: Elsevier SCI LTD, Oxford, England
Uncontrolled Keywords: Polysilazane; Hexagonal and granular TiB2; Ternary glass; High temperature strength PRECERAMIC POLYMER; MATRIX COMPOSITES; TEMPERATURE; MICROSTRUCTURE; PERFORMANCE; PARTICLE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 19 Nov 2018 15:07
DOI: 10.1016/j.ceramint.2018.07.190
Official URL: https://www.sciencedirect.com/science/article/pii/S027288421...
Funders: State Key Laboratory of Solidification Processing (NWPU), China: 135-QP-2015, National Key Research and Development Program of China: 2017YFB0703200, Fundamental Research Funds for the Central Universities: 3102017zy058
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