Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 620, Issue -, Pages 428-434Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.09.107
Keywords
Joining; Interfaces; Carbon/carbon composites; Oxidation
Categories
Funding
- National Natural Science Foundation of China [51221001, 51222207]
- State Key Laboratory of Solidification Processing (NWPU), China [85-TZ-2013]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China [201036]
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To improve the bonding properties of the interface between carbon/carbon (C/C) composites and a Ti-Ni-Si interlayer, an interlocking interface structure was obtained by a two-step technique involving pre-oxidation and hot-pressing. The results show that a porous layer could be obtained on the surface of C/C composites by pre-oxidation treatment at 1173 K in air and that an interlocking C/C-Ti-Ni-Si interface was formed after hot-pressing. With increasing pre-oxidation time, the average shear strength of the Ti-Ni-Si joint initially increased and then decreased. After a pre-oxidation time for 3 min, the shear strength of the joint reached a maximum of 29.81 +/- 1.76 MPa, which is 20.1% higher than the joint strength obtained without pre-oxidation. The improvement in the shear strength is primarily attributed to the 'pinning effect' generated by the interlocking interface, which could play a positive role in extending the crack propagation path by inducing crack deflection. (C) 2014 Elsevier B.V. All rights reserved.
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