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플라즈마 용사에 의해 제조한 AI-SiCp 복합재료 코팅층에서 마찰특성의 온도 의존성
민준원(Joonwon Min),유승을(Seungeul Yoo) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
AI-SiCp composite layer was prepared by plasma thermal spray on aluminum substrate. The homogeneously dispersed composite powder for thermal spray was fabricated by mechanical alloying with ball mill. Composite layers were coated over 800㎛ in thickness.<br/> Friction tests of composite layers and commercial aluminum alloys for comparison were performed in the temperature range of 20~260℃ with the interval of 40℃ with steel counter-face. Friction coefficient was recorded during test sequence, and the microstructure of surface and cross-section of wear tested region was investigated by optical and scanning electron lnicroscope.<br/> Friction coefficients at room temperature were similar in most specimens except pure aluminum, but as the temperature increase, friction coefficient was increased rapidly in the sequence of AC4C, AC2A, and Al-SiCp composite layer. Consequently, the reinforcement of SiC particle into aluminum matrix increased the stability of friction coefficient as well as wear resistance.
박종혁(Jonghyuck Park),민준원(Joonwon Min),유승을(Seungeul Yoo),최정운(Jungwoon Choi),최우석(Wooseok Choi),김시동(Sidong Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Along with increasing awareness of the indoor air quality, the problem of removing gaseous pollutants and smell inside of vehicle has become more important than ever. Volatile organic compound (VOC) generated from inside of vehicles expose drivers to various kinds of diseases for a long period of time. This study analyzes photocatalyst and air purifier. Computational fluid dynamic analysis (CFD) was used to analyze photocatalyst responses and fluid in accordance with the influx of air.
[재료] PTA법에 의한 TiC 표면강화 알루미늉 Brake Disc의 제조 및 성능평가에 관한 연구
유승을(Seungeul Yoo),민준원(Joonwon Min) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
Surface hardening of AC4C aluminium alloy brake disc with TiC powders was obtained by PTA(Plasma Transferred Arc) method. Machinability of the hardfaced area was tested with PCD (Poly Crystalline Diamond) and tungsten carbide tools. Dry, wet, and suction conditions were tested during machining. The flank wears of the tools were compared according to the machining conditions and the tool materials. The performance of TiC hard faced aluminium alloy brake disc was tested by brake dynamometer. The values of brake factor were in the range of 0.261-0.329, and the wear of brake disc was below 0.012 mm in thickness after dynamotest.
박상훈(Sanghoon Park),강우(Woo Kang),민준원(Joonwon Min),김진규(Jinkyu Kim),박민용(Minyong Park) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study is concerned with the performance enhancement of canister absorbing and discharging fuel evaporative emission in gasoline-fueled vehicles. It is introduced that the theoretical concept for new idea and newly designed structure inserted in canister. This structure applied in canister play a advantageous part on increasing the working capacity of canister. It is proved that this designed canister using phase change materials have better performance than the conventional canister through basic performance test.
김경아(Kyoungah Kim),성창현(Changhyun Sung),손민호(MinHo Son),민준원(Joonwon Min),정상빈(Sangbin Jeong) 한국자동차공학회 2022 한국자동차공학회 지부 학술대회 논문집 Vol.2022 No.5
As the 4th industrial revolution technology is applied in the development of future weapon systems, more electronic devices are being added to military ground vehicles. As a result, power requirements continue to increase. It is necessary to convert to hydrogen energy and electrification, which is a high-density energy source and has the potential to generate low noise and low thermal signature. Korea has already secured world-class technologies in the field of hydrogen power. By linking this technology with the military, in the defense field, it is possible to enhance advanced power, lead the global defense market by nurturing the defense industry and increasing defense exports, and in the civil sector, it is possible to secure the technology and competitiveness to lead the global hydrogen economy.
Laser Pattern 형상에 대한 마찰특성에 관한 연구
정우영(WooYoung Chung),김상호(SangHo Kim),한형욱(HyungWook Han),민준원(JoonWon Min),정원용(Won Yong Jeung),이명호(MeungHo Rhee) 한국트라이볼로지학회 2009 한국트라이볼로지학회 학술대회 Vol.2009 No.11
Although laser texturing technology is known for effective method to improve the tribological performance of friction surface for years, new applications are reported. Up to date, laser texturing approaches found in the literature are mainly discussed about the dimple shape cases or its friction effect problems. However, for industrial applications, the line pattern characteristic of laser texturing becomes another interest for the friction process. The impact of line pattern on lubricating surface conditions was investigated in this study. Tribological experiments were conducted with the STD61 steel patterned for a variety of depths, gaps, and shapes. Marking laser with a scanner were used for the laser texturing process.
레이저 텍스처링을 이용한 점과선을 결합한 Pattern의 마찰특성
정우영(WooYoung Chung),김상호(SangHo Kim),한형욱(HyungWook Han),민준원(JoonWon Min),정원용(WonYong Jeung),이명호(MeungHo Rhee) 한국트라이볼로지학회 2010 한국트라이볼로지학회 학술대회 Vol.2010 No.6
Laser Surface Texturing(LST) is typical high speed micro forming process using the pulsed laser to form micro dimple shapes on friction area with high lubrication characteristics like e.g. piston ring. In view of new low friction methods, special surface processes like Laser Texturing gain importance for the associated field. For a better understanding of the working mechanisms and the process for the coupling of line patterning and dimple texturing models, advanced combination rules as well as detailed experimental investigations is required. New results of research concerning correlations among dimple and line depths, and lubricant conditions are presented.