http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
윤한기(Hanki Yoon),조승연(Seongyeon Cho),정용환(Yonghan Jeong) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.2
Testing blanket concept in the integrated fusion environment is one of the principal objective of ITER. Blanket test modules will be intended in ITER from its operation and will be provide the first experimented data on the feasibility of the D-T cycle for fusion. In the Dual Coolant Lead Lithium(DCLL) blanket, the key element is the Flow Channel Insert(FCI) made of a silicon carbide and composite(SiCf/SiC), which serves as electric and thermal insulator. Therefore, the idea of using FCI as both electric and thermal insulator takes center place in ITER blanket concept, with Pb-17Li as a breeder and SiC ceramic and ferrite steel as a structural material. In this specials session, the trend of the design concept and R&D of fusion blanket material are introduced.
Effects of Substrate materials on SiC Film Coating by RF Sputtering System
윤한기(HanKi Yoon),문승현(Hyun Moon),김태규(TaeGyu Kim),무라카미 리이치(Ri-Ichi Murakama) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Silicon carbide thin film was coated onto 3 types of materials by RF sputtering system. The substrates were graphite, si and sapphire. Surface roughness of substrate was polished by wet polishing. Coating conditions were 200 W of RF power and 3 mTorr pressure of argon gas. Deposition time was 3 hours in 600℃ temperature. Specimens were heat treated in 1200℃ vacuum chamber. XRD was used for detecting the coated SiC thin film by thin film mode. FE-SEM was used to characterize the microstructure of SiC coating film.
소결온도 및 SiO₂ 첨가량에 따른 탄화규소의 마모 특성
박성호(SungHo Park),박원조(WonJo Park),윤한기(HanKi Yoon) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.11
In this study, liquid phase sintered SiC (LPS-SiC) materials were made by hot pressing method. The particle size of nano-SiC powder was 30㎚. Alumina (Al₂O₃), yttria (Y₂O₃) and silica (SiO₂) were used for sintering additives. To investigate effects of SiO₂, ratios of SiO₂ contents were changed by five kinds. Materials have been sintered for 1 hour at 1760℃, 1780℃ and 1800℃ under the pressure of 20㎫. The system of sintering additives which affects a property of sintering as well as the influence depending on compositions of sintering additives were investigated by measurement of density, mechanical properties such as flexural strength, vickers hardness and sliding wear resistance were investigated to make sure of the optimum condition which is about matrix of SiCf/SiC composites. The abrasion test condition apply to load of 20N at 100RPM for 20min. Sintered density, flexural strength of fabricated LPS - SiC increased with increasing the sintering temperature. And in case of LPS-SiC with low SiO₂, sliding wear resistance has very excellent. Monolithic SiC 1800℃ sintering temperatures and 3wt% have excellent wear resistance.
소결온도 및 SiO₂첨가량에 따른 탄화규소의 마모 특성
박성호(SungHo Park),박원조(WonJo Park),윤한기(HanKi Yoon) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In this study, monolithic liquid phase sintered SiC (LPS-SiC) was made by hot pressing method with nano-SiC powder whose a particle size is 30㎚ and less on the average. Alumina (Al₂O₃), yttria (Y₂O₃) and silica (SiO₂) were used for sintering additives. To investigate effects of SiO₂, Al₂O₃/Y₂O₃ composition was fixed and then ratios of SiO₂ were changed as seven kinds. Materials have been sintered for 1 hour at 1760℃, 1780℃ and 1800℃ under the pressure of 20㎫. The system of sintering additives which affects a property of sintering as well as the influence depending on compositions of sintering additives were investigated by measurement of density, mechanical properties such as flexural strength, vickers hardness and sliding wear resistance were investigated to make sure of the optimum condition which is about matrix of SiC<SUB>f</SUB>/SiC composites. The abrasion test condition apply to load of 20N at 100RPM for 20min. Sintered density, flexural strength of fabricated LPS - SiC increased with increasing the sintering temperature. And in case of LPS-SiC with low SiO₂, has very excellent wear resistance.
MoSi₂기 복합재료의 제조과정에 따른 트라이볼로지 특성
박성호(Sungho Park),박원조(Wonjo Park),허선철(Sunchul Huh),이광영(Kwangyoung Lee),윤한기(Hanki Yoon) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, monolithic MoSi₂, 20 vol.% SiC particles-reinforced MoS₂ matrix, SiC/MoSi<br/> composite and 20 vol.% ZrO₂ panicles-reinforced MoSi₂ matrix, ZrO₂/MoSi₂ composite was fabricated by hot pressed sintering at 1350℃ under 30 ㎫ during 60 min. Vickers hardness and sliding wear resistance of the monolithic MoSi₂, ZrO₂/MoSi₂ and SiC/MoSi₂ composite was investigated at room temperature. Abrasion tester used a pin-on-disk type and a Si3N4 ceramic ball which used as machine structural materials. The test condition apply to load of 8kgf a 7.5rpm for 6 hours and the effect of hardness is also discussed The ZrO₂/MoSi₂ composite has shown the very excellent wear resistance compared with monolithic MoSi₂ and SiC/MoSi composite at room temperature.<br/>