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Kinetic Spraying Deposition of Reactive-Enhanced Al-Ni Composite for Shaped Charge Liner Applications

Title
Kinetic Spraying Deposition of Reactive-Enhanced Al-Ni Composite for Shaped Charge Liner Applications
Author
이창희
Keywords
Al-Ni composite; arrested reactive milling; kinetic spraying; shaped charge liner
Issue Date
2016-02
Publisher
SPRINGER
Citation
JOURNAL OF THERMAL SPRAY TECHNOLOGY, v. 25, NO 3, Page. 483-493
Abstract
Liners used in shaped charges (SC) must possess good penetration ability and explosive power. Producing the reactive layer (i.e., the Al-Ni composite) on a well-penetrating liner (i.e., Cu) via spray coating is a novel method; the exothermic reaction of this reactive layer can be enhanced by controlling the structure of the feedstock material. However, preceding studies have been unable to completely succeed in achieving this goal. There is still an opportunity to improve the performance of reactive layers in SC liner applications. In order to address this problem, a reactive Al-Ni composite powder was produced via arrested reactive milling (ARM) and deposited by a kinetic spray process. Afterward, the deposition state and self-propagating high-temperature synthesis (SHS) reaction behavior of the ARMed Al-Ni deposit were investigated. The deposition state was degraded by the ARM process due to the remaining solid lubricant and the strain-hardening effect, but the practically estimated bond strength was not poor (similar to 40 MPa). No SHS reactions were induced by the ARM and kinetic spray process, which resulted in the quantitative maximization of the exothermic reaction. It is noteworthy that the initiation temperature of the SHS reaction was highly advanced (similar to 300 degrees C) relative to preceding studies (similar to 500 degrees C); this change is due to the additional mechanical activation initiated by the kinetic spray deposition.
URI
https://link.springer.com/article/10.1007%2Fs11666-015-0368-2http://hdl.handle.net/20.500.11754/31749
ISSN
1059-9630; 1544-1016
DOI
10.1007/s11666-015-0368-2
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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