논문 해외 국제전문학술지(SCI급) MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TIC NANOPARTICLE-REINFORCED IRON-MATRIX COMPOSITES
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2014-03
- 저자명 김정민공동(교신),YUN, HS,PARK, JS
- 학술지명 STRENGTH OF MATERIALS
- 발행처명 SPRINGER
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
Uniformly distributed TiC nanoparticle-reinforced iron-based composites were successfully fabricated by planetary milling in argon and subsequent hot pressing procedures. Nearly full density composite specimens could be obtained via 6-hour milling and hot pressing at 1100 °C under 50 MPa. Spherical TiC particles and fine fibrous Fe3C phases were observed to form the iron-matrix composites and subjected to comparative analysis. Microstructural analysis results show that theaverage diameter of TiC particles and the length of Fe3C phases tend to decrease with an increase in a TiC volume content. The compression yield strength of hot-pressed composites increased in proportion to the TiC content, resulting in 1.3 GPa for 7.5 % TiC. The relationship between the microstructural characteristics and the yield strength of TiC-reinforced composites was also investigated. Based on the Orowan strengthening mechanism, a higher strength is observed for a high TiC content, mainly due to reduced distance between reinforcing TiC nanoparticles.