A Study of Temperature and Pressure Effect on Powder Densification Processes: Pressureless Sintering, Gas Pressure Sintering, & Hot Isostatic Pressing
- 주제(키워드) sintering , hot isostatic pressing , gas pressure sintering , stainless steel , nuclear fuel
- 발행기관 포항공과대학교 일반대학원
- 지도교수 박성진
- 발행년도 2014
- 학위수여년월 2014. 2
- 학위명 석사
- 학과 및 전공 일반대학원 첨단원자력공학부
- 실제URI http://www.dcollection.net/handler/postech/000001675830
- 본문언어 영어
- 저작권 포항공과대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Pressure-assisted sintering became a promising technology because of its ability to produce full density products. Gas pressure sintering (GPS) and hot isostatic pressing (HIP) were studied along with pressureless sintering. Stainless steel and uranium dioxide were selected as research material. Since compaction result affects densification process, compaction experiment and simulation were studied additionally. Pressureless sintering adopted diffusional creep model. And because pressure applied in GPS is relatively small, GPS also adopted the same model as pressureless sintering. On the other hand, HIP uses high pressure (>100 MPa), so power-law creep model was applied. Each study of densification process contains theoretical study, experiment, and simulation. In theoretical study, constitutive model was established and experiments were conducted with different conditions. And simulation was developed by using predefined constitutive model and experimental results.
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