Compression Property of C/SiC and Inconel X-750 Springs from Room Temperature to 1000°C

Abstract:

The compression properties of C/SiC composite and Inconel X-750 helical springs were investigated from room temperature (RT) to 1000°C in air. The density of C/SiC spring is 1.74 g/cm³, only ~1/5 of X-750 value (8.17 g/cm³) and the spring constants of C/SiC and X-750 springs at RT are 3.47 and 5.61 N/mm, respectively. The spring constants of X-750 spring decreased with increase of temperature. X-750 spring could keep excellent property below 600°C, but its spring constant was only 36.7% of RT value at 800°C and permanent deformation appeared. At 1000°C, it could not restore and was destroyed. The spring constants of C/SiC spring at 400°C and 600°C were appreciably higher than the RT value, and then decreased with temperature elevating. Above 800°C, the spring constant decreased with test progressing because of the oxidation of carbon fibers and SiC matrix. But it has a spring constant of 2.40 N/mm (69.2% of the RT value) at 1000°C and can revert to its original dimensions.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 616-621
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.616
• Online since: April 2014
• Authors: Si’an Chen*, Yu Di Zhang, Chang Rui Zhang, Xin Xiong, Hai Feng Hu
• Keywords: C/SiC Composite, Compression Property, High-Temperature, Inconel X-750, Spring

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