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커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
The Cu-based bulk glassy alloys in Cu-Zr-Ti-Ni systems were prepared by means of copper mold casting. The Cu-based bulk glassy alloys samples were tested by X-ray diffractomer (XRD), differential scanning calorimeter, scanning electron microscopy (SEM), Instron testing machine and Vickers hardness instruments. The result indicated that the prepared Cu-Zr-Ti-Ni alloys were bulk glassy alloys. The temperature interval of supercooled liquid region (∆Tx) was about 45.48 to 70.98 K for the Cu-Zr-Ti-Ni alloy. The Vickers hardness was up to 565 HV for the Cu50Zr25Ti15Ni10 bulk glassy alloy. The Cu50Zr25Ti15Ni10 bulk glassy alloys were annealed in order to obtain nanocrystals. The results showed that the Vickers hardness was raise up to 630 HV from 565 HV. As shown in XRD results, the amorphous alloys changed to nanocrystals, which were Cu8Zr3, Cu3Ti2 and CuZr, improved the hardness. The SEM analysis showed that the compression fractured morphology of amorphous alloys was brittle fracture, and the fracture morphology after annealing was ductile fracture. This proved that annealing of amorphous to nanocrystals can improve the plasticity and toughness of amorphous alloys.
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참고문헌 (11)
참고문헌 신청
Barekara N S / 2010 / Structure-property relations in bulk metallic Cu-Zr-Al alloys / Mater. Sci. Eng. A 527:5867~5872
Dai C L / 2006 / A new centimeter-diameter Cu-based bulk metallic glass / Scripta Mater 54:1403~1408
Fu H M / 2008 / Cu-based bulk amorphous alloy with larger glass-forming ability and supercoiled liquid region / J. Alloy Compo 458:390~393
Kim Y C / 2006 / Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses / Mater. Sci. Eng. A 437:248~253
Li C / 2007 / Deformation and mechanical properties of Cu-based bulk metallic glasses during crystallization / Chin. J. Nonferrous Met 17:1586~1591
Dai C L / 2006 / A new centimeter-diameter Cu-based bulk metallic glass / Scripta Mater 54:1403~1408
Fu H M / 2008 / Cu-based bulk amorphous alloy with larger glass-forming ability and supercoiled liquid region / J. Alloy Compo 458:390~393
Kim Y C / 2006 / Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses / Mater. Sci. Eng. A 437:248~253
Li C / 2007 / Deformation and mechanical properties of Cu-based bulk metallic glasses during crystallization / Chin. J. Nonferrous Met 17:1586~1591
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