Composite materials based on high-modulus compounds for additive technology

International Seminar on Interdisciplinary Problems in Additive Technologies

材料科学;物理学

Grigoriev, M.^1,2 ; Kotelnikov, N.^3 ; Buyakova, S.^1,2,3 ; Kulkov, S.^1,2,3

Institute of Strength Physics and Materials Science, SB RAS, 2/4, pr. Akademicheskii, Tomsk

634055, Russia^1

Tomsk Polytechnic University, Tomsk, 30, Lenin Avenue, Tomsk

634050, Russia^2

Tomsk State University, Tomsk, 36, Lenin Avenue, Tomsk

634050, Russia^3

关键词: Additive technology;    Argon atmospheres;    Fine structures;    Hierarchical structures;    Multi-scale;    Nanocrystallines;    Physical and mechanical properties;    Sintering temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/140/1/012009/pdf
DOI  :  10.1088/1757-899X/140/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The effect of adding nanocrystalline ZrO2and submicron TiC to ultrafine Al2O3on mechanical properties and the microstructure of the composites developed by hot pressing was investigated. It was shown that by means of hot pressing in argon atmosphere at the sintering temperature of 1500 °C one can obtain the composites of Al2O3-ZrO2-TiC with a fine structure and minimal porosity. It was shown that in the material a multi-scale hierarchical structure is formed, which possesses high physical and mechanical properties: the hardness and fracture toughness was 22 GPa and 5.2 MPa∗m1/2, respectively. It has been shown that mechanical properties of the composite are better than those of commercial composites based on aluminum oxide (Al2O3, ZTA, Al2O3-TiC) and are comparable to those of silicon nitride.