CNTs reinfoced alumina ceramics prepared by hot pressing technology with ultra-fast heating rate based on combustion reaction

Chin J Mater Res

2009, Vol. 23

Issue (1): 59-63 DOI:

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CNTs reinfoced alumina ceramics prepared by hot pressing technology with ultra-fast heating rate based on combustion reaction

HUANG Liwei; FU Zhengyi; MENG Fancheng; ZHANG Jinyong

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Wuhan University of Technology; Wuhan 430070

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HUANG Liwei FU Zhengyi MENG Fancheng ZHANG Jinyong. CNTs reinfoced alumina ceramics prepared by hot pressing technology with ultra-fast heating rate based on combustion reaction. Chin J Mater Res, 2009, 23(1): 59-63.

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Abstract

A novel method for producing carbon nanotubes (CNTs) reinforced alumina ceramics was reported. The reaction heat generated by combustion was utilized as a high temperature source, and great mechanical pressure was applied when the combustion reaction was finished. When adding 1% CNTs, the fracture toughness of the composites increased about 50% compared with the pure alumina ceramics prepared in the same conditions. The results indicate that the sintering method is beneficial to protecting the CNTs from destruction. The toughening mechanisms are mainly CNTs pulled-out and CNTs bridging.

Key words: carbon nanotubes;self-propagating combustion /Quick Pressing;toughening;pulled-out mechanism;bridging mechanism

Received: 11 June 2008

ZTFLH:

TB332

Fund:

Supported by National Natural Science Foundation of China No.50772081 and Project Fund of Ministry of Education No.PCSIRT0644.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2009/V23/I1/59

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