통합 검색 | Korea Science

한국광학기기협회
- 광학세계
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- 제12권6호통권70호
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- pp.49-52
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- 2000
1990년대 들어서면서 광학업체에도 환경보호 개념이 도입되고 있다. 렌즈를 가공할 때에 발생하는 찌꺼기에는 상당량의 납이 포함되어 있어, 이로 인한 토양 오염이 우려돼 왔다. 캐논은 1993년 납이 포함되지 않은 광학유리만으로 설계해 제작한 SLR카메라용 렌즈를 발표했다. 또 1990년대 중반을 지나면서 기술이 크게 성장한 글라스몰드에는 처음부터 환경문제를 고려해 납을 포함하지 않은 광학유리가 공급됐다. 캐논 생산기술연구소 디바이스프로세스 제3연구실 나
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박은수;이주호;김상현;허무영;김휘준;배정찬
- 한국소성가공학회:학술대회논문집
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- 한국소성가공학회 2007년도 춘계학술대회 논문집
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- pp.118-121
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- 2007
Bulk metallic glass (BMG)/crystalline composites comprising a copper based BMG alloy and crystalline nickel were produced by means of eloctroless plating of nickel on $Cu_{54}Zr_{22}Ti_{18}Ni_6$ BMG powder and subsequent consolidation using spark plasma sintering. The plastic deformation behavior of BMG/crystalline composites was examined by uniaxial compression test at various temperatures in the supercooled liquid region (SLR) of the BMG alloy. The evolution of strain states during uniaxial compression was tackled by microstructure observations. Deformation temperature played an important role in the deformation behavior of BMG/crystalline composites, which was attributed to a strong temperature dependence of the flow stress of the BMG alloy in the SLR. BMG/crystalline composites deformed homogenously in the temperature range where the flow stress of the BMG alloy was close to that of crystalline nickel. In contrast, inhomogeneous deformation was observed in the temperature range where the flow stress of the BMG alloy largely differs from that of crystalline nickel.
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