논문 국내 국내전문학술지(KCI급) 저압가스질화에서 탄소강의 초기 화합물층 형성 거동
- 학술지 구분 국내전문학술지(KCI급)
- 게재년월 2011-06
- 저자명 김윤기
- 학술지명 한국표면공학회지
- 발행처명 한국표면공학회
- 발행국가 국내
- 논문언어 한국어
홈페이지논문 초록 (Abstract)
Growth behaviors of iron-nitride on S45C steels at low pressure gas nitr iding were examined. Surfaces of the steels covered withfine and porous oxide during the pre-oxidatio n using N2O gas. Well faceted particles connected with them were observe d after 1 min nitriding. They grew steadily and filled inter-pores durin g additional nitriding process. From the X-ray diffraction analysis, γ'-i ron nitride was dominantly formed at the initial stage but the amount of ε-iron nitride was rapidly increase d as nitriding treatment time. The porous layer was formed on the particles and thickened up to half of nitride la yer after 60 min nitriding. The observed growth behaviors were discussed in internal stress related with volume e xpansion involved in transforming from iron to iron-nitrides.