Acta Metall Sin  2011, Vol. 47 Issue (9): 1105-1111    DOI: 10.3724/SP.J.1037.2011.00281

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PREPARATION OF NANO-SIZED SiC REINFORCED NiTi SHAPE MEMORY COMPOSITES AND THEIR MECHANICAL PROPERTIES AND DAMPING BEHAVIOR

JIANG Hongjie, KE Changbo, CAO Shanshan, MA Xiao, ZHANG Xinping

School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640

JIANG Hongjie KE Changbo CAO Shanshan MA Xiao ZHANG Xinping. PREPARATION OF NANO-SIZED SiC REINFORCED NiTi SHAPE MEMORY COMPOSITES AND THEIR MECHANICAL PROPERTIES AND DAMPING BEHAVIOR. Acta Metall Sin, 2011, 47(9): 1105-1111.

Abstract References Related Articles Recommended Metrics Download:  PDF(1671KB)  Export:  BibTeX | EndNote (RIS)       Abstract  NiTi shape memory alloys have attracted significant attention for applications in various fields in the past decades. Although porous NiTi alloys exhibit lower density compared with the dense ones, they are inevitably lower in strength, storage modulus and damping capacity. Therefore, it is imperative to study and improve the compressive performance and storage modulus in porous NiTi alloys. In this study, the nano-sized SiC particle reinforced NiTi shape memory alloy based composites (SiC/NiTi) have been successfully fabricated by means of a step powder-sintering method, which show unique characteristics of lightweight, high strength and stable superelasticity. The fabricated SiC/NiTi composites possess almost the same equivalent strength compared with dense NiTi alloys. On the other hand, they are in the nature of higher strength, including compressive strength and equivalent compressive strength, than porous NiTi alloys. Furthermore, the strength increases with increasing contents of SiC particles. It has been indicated that the addition of SiC particles has a slight influence on the phase composition of the SiC/NiTi composites, while the martensitic phase transformation temperatures of the composites keep unchanged compared with the NiTi alloy without SiC reinforcement. Meanwhile, the fabricated composites inherit the high damping performance of the NiTi matrix, and thus exhibit a high storage modulus. Key words:  NiTi shape memory alloy      nano-sized SiC particle      composite      mechanical property      damping      Received:  04 May 2011      Fund:  Supported by National Natural Science Foundation of China (Nos.50871039 and 50801029) and the Fundamental Research Funds for the Central Universities (No.2011ZM0001) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors JIANG Hong-Jie KE Chang-Bei CAO Pan-Pan MA Xiao ZHANG Xin-Beng URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00281     OR     https://www.ams.org.cn/EN/Y2011/V47/I9/1105 [1] Miyazaki S, Otsuka K. Trans ISIJ, 1989; 29: 353 [2] Graesser E J, Cozzarelli F A. J EngMech, 1991; 117: 2590 [3] Aiken I D, Nims K D, Whittaker A S, James M K, Eeri M. Earthq Spectra, 1993; 9: 335 [4] Van Humbeeck J. J Alloys Compd, 2003; 355: 58 [5] Li D S, Zhang Y P, Xiong Z P, Zhang X P. Acta Metall Sin, 2008; 44: 995 (李大圣, 张宇鹏, 熊志鹏, 张新平. 金属学报, 2008; 44: 995) [6] Li B Y, Rong L J. 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