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Journal of Advanced Ceramics

, Volume 7, Issue 3, pp 229–236 | Cite as

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

  • Bin Li
  • Guangqi Li
  • Haiyang Chen
  • Junhong Chen
  • Xinmei Hou
  • Yong Li
Open Access
Research Article
  • 13 Downloads

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 °C) 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 °C and 18.76 W/(m·K) and 19.42 W/(m·K) as temperature rises to 350 °C, 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 sintering CM2A8 C2M2A14 physical properties mechanical properties 

Notes

Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 51572019) and the National Science Fund for Excellent Young Scholars of China (No. 51522402).

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijingChina
  3. 3.Shandong Shengchuan Ceramics Co., Ltd.ShandongChina
  4. 4.School of Architecture and ConstructionHebei University of ArchitectureZhangjiakouChina

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