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Research Article | Open Access

Physical and mechanical properties of hot-press sintering ternary CM2A8 (CaMg2Al16O27) and C2M2A14 (Ca2Mg2Al28O46) ceramics

Bin LIa,b, Guangqi LIc, Haiyang CHENd, Junhong CHENa( ), Xinmei HOUb( ), Yong LIa
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Shandong Shengchuan Ceramics Co., Ltd., Shandong 255100, China
School of Architecture and Construction, Hebei University of Architecture, Zhangjiakou 075000, China
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Abstract

The new ternary CM2A8 (CaMg2Al16O27) and C2M2A14 (Ca2Mg2Al28O46) pure and dense ceramics were first prepared by a hot-press sintering technique, and their physical and mechanical properties were investigated. The purity of obtained CM2A8 and C2M2A14 ceramics reaches 98.1 wt% and 97.5 wt%, respectively. Their microstructure is dense with few observable pores, and their grain size is about a few dozen microns. For their physical properties, the average apparent porosity of CM2A8 and C2M2A14 ceramics is 0.18% and 0.13%, and their average bulk density is 3.66 g/cm3 and 3.71 g/cm3, respectively. The relative density of CM2A8 ceramic is 98.12% and that of C2M2A14 ceramic is 98.67%. The thermal expansivity (50–1400 ℃) of CM2A8 and C2M2A14 ceramics is 9.24×10–6 K–1 and 8.92×10–6 K–1, respectively. The thermal conductivity of CM2A8 and C2M2A14 ceramic is 21.32 W/(m·K) and 23.25 W/(m·K) at 25 ℃ and 18.76 W/(m·K) and 19.42 W/(m·K) as temperature rises to 350 ℃, respectively. In addition, the mechanical properties are also achieved. For CM2A8 ceramic, the flexural strength is 248 MPa, the fracture toughness is 2.17 MPa·m1/2, and the Vickers hardness is 12.26 GPa. For C2M2A14 ceramic, the flexural strength is 262 MPa, the fracture toughness is 2.23 MPa·m1/2, and the Vickers hardness is 12.95 GPa.

Keywords

hot-press sinteringCM2A8C2M2A14physical propertiesmechanical properties

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Journal of Advanced Ceramics
Volume 7 Issue 3,
September 2018
Pages 229-236
DOI: 10.1007/s40145-018-0274-4
Cite this article:
LI B, LI G, CHEN H, et al. Physical and mechanical properties of hot-press sintering ternary CM2A8 (CaMg2Al16O27) and C2M2A14 (Ca2Mg2Al28O46) ceramics. Journal of Advanced Ceramics, 2018, 7(3): 229-236. https://doi.org/10.1007/s40145-018-0274-4

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Received: 24 February 2018
Revised: 23 March 2018
Accepted: 28 March 2018
Published: 10 October 2018
© The author(s) 2018

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