| 학회 | 한국재료학회 |
| 학술대회 | 2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 | 22권 1호 |
| 발표분야 | D. 구조 재료 분과 |
| 제목 | Development of Co-based metallic glasses with Superior Mechanical properties using high-entropy alloy concept |
| 초록 | Usually, metallic glass alloys exhibit high strength value superior to conventional crystalline alloys, often combined with a large elastic limit, corrosion resistance and wear resistance, etc. Specially, Co-based metallic glass alloys display the extremely soft magnetic properties as well as ultrahigh fracture strength/hardness (Bulk Co-Fe-Ta-B alloy: 5185 MPa fracture strength and 1455 Vickers) and high Young’s modulus (Co-Fe-Ta-B: 270 GPa in bulk specimen, 140 GPa in =100m wire). However, it is well recognize that the expensive raw materials price of Cobalt element and low glass forming ability (GFA) of Co-based metallic glass alloy has limited the potential of using them as engineering materials and thus the new strategies for alloy design are demanded for applications. In this study, the Co-based metallic glasses are developed via the transitional combination for designing metallic glass (Ferrous + Transition metal + Metalloid element) and high-entropy alloy concept (more than five elements, each elements have an atomic concentration between 5 at.% and 35 at.%). The developed metallic glass alloys are composed of ferrous elements (Co, Fe, Ni), transition metals (Cr, Mo) and metalloid elements (C, B). Moreover, the Cobalt elements comprise a major proportion of those developed alloys despite the whole samples contain the low Co content under 25 at.%. The present work intends to report the thermal properties, mechanical properties and magnetic properties of (CoFeNi)50(CrMo)x(CB)50-x with x = 20, 25, 30 alloys. |
| 저자 | 김정태1, 홍성환1, 박혜진1, 김영석1, 박진만2, 김기범1 |
| 소속 | 1세종대, 2삼성전자 |
| 키워드 | HEAs; amorphous alloy; alloy design; Co-based |
