http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fe - Cr - Ni 강 ( ASTM A447 ) 의 Sigma 상 생성과 바나듐 침식
강성군,박필상,조종수 한국부식학회 1981 Corrosion Science and Technology Vol.10 No.1
The vanadium attack of sigma phase occurrence in high chromium-nickel steel (ASTM A447) hay been studied in fuel oil combustion environment. 80mole % V₂O_5-20mole% Na₂SO₄ was used as corrosive synthetic ash. Using metallograph and scanning electron microscope, various changes of microstructure of the specimen were observed in the corrosion process. The vanadium attack way affected by carbide rathed than sigma phase in initial period of the test, but in the later period, sigma phase occurrence was more related for the attack. Vanadium attack seemed to be propagated along the boundary of matrix and sigma phase. Finally, sigma phase itself might be flaked out from grain boundary. However, stress corrosion cracking might be propagated through sigma phase which is brittle.
SO2 가스에 의한 철 - 규소합금의 고온황화부식에 미치는 탄소의 영향
강성군,정헌달 한국부식학회 1989 Corrosion Science and Technology Vol.18 No.1
The high temperature sulfidation reaction of Fe-Swt% Si alloys containing 0.5, 0.7, 1.0, 1.7wt% C was investigated in 1 atm SO₂ gas pressure at temperature ranging from 650℃ to 800℃. The sulfidation rate of the alloys was determined by thermogravimetric analysis. The structure and the composition of the reaction products were identified by the aid of SEM, EDS, AES analysis and X-ray diffraction technique. The scales formed on the alloy surface consisted of two types of layers: the outer Layers (FeO, Fe₃O₄, Fe₂O₃) and the inner layers (FeS, SiO₂). The overall reaction process obeyed a parabolic rate law over the temperature range 650-800℃, in which the reaction rate increased with increasing in the temperature. The activation energies for the sulfidation reaction of Fe-5Si, Fe-5Si-0.7C and Fe-5Si-1.7C were 41.2, 59.3, 96.6 KJ/mol, respectively. The addition of carbon in the Fe-Si alloy retarded the sulfidation reaction by forming the dense outer oxide layer and the thick inner SiO₂ layer. However, the influence of the carbon on the sulfidation rate was not remarkable above 800℃.
강성군,권선중,김교헌,이민규 한국건강심리학회 2011 한국심리학회지 건강 Vol.16 No.1
The purpose of this study was to test the reliability and validity of the Korean version of the Gambling Urge Scale(Raylu & Oei, 2004a). The urge or craving to gamble is a physiological, psychological, or emotional motivational state, often associated with continued gambling. The factor structure, reliability, item property and criterion-related evidence of validity are analyzed for 1,158 adults including local casino employee and customers. The Korean version of the Gambling Urge Scale, in a similar way as the original version, displays a stable one factor structure and high reliability(Cronhach's alpha=.93∼95), showing good convergent validity(level of gambling addiction r=.258∼.587, frequency of gambling behaviors r=.336, irrational gambling belief r=.397, gambling motivations r=.420∼.614, all ps<.001). Findings suggest that the K-GUS is reliable and valid in assessing gambling craving during a gambling addiction studies. Implications of the findings and directions for research on gambling addiction are discussed.