ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Low Cost Preparation and Mechanical Property of Three-dimensional Needled C/SiC Bolts
Received date: 2012-08-30
Revised date: 2012-11-29
Online published: 2012-12-26
Supported by
National Natural Science Foundation of China (51032006,50820145202)
Semi-finished carbon/silicon carbide (C/SiC) composites plates with the density of 1.50-1.60 g/cm3 are prepared by chemical vapor infiltration (CVI) of the three-dimensional needled carbon fiber preform. Then, stud and head blank of bolts are cut and tapped by special abrasive tools according to certain sample location from composites plates. By assembling the stud and head into a whole, the semi-finished bolts are subsequently obtained. Finally, the bolts are densified and SiC coating is deposited on surface of them by CVI. So, low-cost 3D needled C/SiC composites bolts are prepared. The methods are proposed to evaluate mechanical properties of C/SiC composite bolts and the mechanical properties are measured by special clamps.The rupture morphology are observed and analyzed by scanning electron microscope (SEM).The results show that C/SiC composite bolts have better mechanical properties.The tensile strength and shear strength of C/SiC composite bolts are 151.7 MPa and 85.67 MPa respectively.
LIU Jie , LI Haibin , LIU Xiaoying . Low Cost Preparation and Mechanical Property of Three-dimensional Needled C/SiC Bolts[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(7) : 1724 -1730 . DOI: 10.7527/S1000-6893.2013.0287
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