Fabrication of W-Cu Alloy via Combustion Synthesis Infiltration Under an Ultra-Gravity Field
SCIE
SCOPUS
KCI
- Title
- Fabrication of W-Cu Alloy via Combustion Synthesis Infiltration Under an Ultra-Gravity Field
- Authors
- Song, YP; Li, Q; Li, JT; He, G; Chen, YX; Kim, HS
- Date Issued
- 2014-11
- Publisher
- KOREAN INST METALS MATERIALS
- Abstract
- Tungsten copper alloy with a tungsten concentrate of 70 vol% was prepared by self-propagating high-temperature synthesis in an ultra-gravity field. The phase structures and components of the W-Cu alloy fabricated via this approach were the same as those via traditional sintering methods. The temperature and stress distributions during this process were simulated using a new scheme of the finite element method. The results indicated that nonequilibrium crystallization conditions can be created for combustion synthesis infiltration in an ultra-gravity field by the rapid infiltration of the liquid copper product into the tungsten compact at high temperature and low viscosity. The cooling rate can be above 100,000 K/s and high stresses in tungsten (similar to 5 GPa) and copper (similar to 2.6 GPa) were developed, which passivates the tungsten particle surface, resulting in easy sintering and densifying the W-Cu alloy. The reliability of the simulation was verified through temperature measurement and investigation of the microstructure. The W-Cu composite-formation mechanism was also analyzed and discussed with the simulation results.
- Keywords
- tungsten copper alloy; combustion synthesis infiltration technique; microstructure; simulation; MECHANICAL-PROPERTIES; W/CU-COMPOSITES; NI
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13680
- DOI
- 10.1007/S12540-014-6019-1
- ISSN
- 1598-9623
- Article Type
- Article
- Citation
- METALS AND MATERIALS INTERNATIONAL, vol. 20, no. 6, page. 1145 - 1150, 2014-11
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.