Synthesis and mechanical and thermal properties of (Cr,Mn)2AlC solid solutions |
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| Authors: | Haolin Li Huan Mao Yang Zhou |
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| Affiliation: | Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing, China |
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| Abstract: | (Cr,Mn)2AlC solid solutions have attracted much attention due to their magnetic property which will be enhanced with increasing Mn solubility. So far, only 3?at.-% Mn solubility in (Cr,Mn)2AlC bulk materials has been reported. This work reports on the synthesis of (Cr,Mn)2AlC solid solutions via a new reaction route with AlCr2, C and Mn as starting materials. The Mn solubility increases with increasing the starting Mn content. The maximum solubility of Mn in (Cr,Mn)2AlC was 8.3?at.-%, corresponding to a resultant solid solution (Cr0.83Mn0.17)2AlC. However, increasing the Mn content in the starting mixture caused the formation of impurities in the sintered samples. A dense (Cr0.95Mn0.05)2AlC ceramic has been achieved by hot-pressing the mixture of AlCr2/C/0.1Mn. The mechanical properties and thermal expansion coefficient of (Cr0.95Mn0.05)2AlC were measured. |
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| Keywords: | MAX phases solid solution (Cr,Mn)2AlC mechanical property thermal property |
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