분말사출성형 시 분말 혼합체의 유동성 시뮬레이션을 통한 투광성 알루미나 소결체의 특성 연구
- Title
- 분말사출성형 시 분말 혼합체의 유동성 시뮬레이션을 통한 투광성 알루미나 소결체의 특성 연구
- Other Titles
- A study on the Powder Injection Molding of Translucent Alumina via Flowability Simulation of Powder/Binder Mixture
- Author
- 김영도
- Keywords
- Powder Injection Molding; Translucent alumina; Flow front; Shear rate; Simulation
- Issue Date
- 2014-05
- Publisher
- 한국분말야금학회, 2014.
- Citation
- 한국분말야금학회지, 2014. 21(3), p. 215-221
- Abstract
- Translucent alumina is a potential candidate for high temperature application as a replacement of the glassor polymer. Recently, due to the increasing demand of high power light emitting diode (LED), there is a growing inter-est in the translucent alumina. Since the translucent property is very sensitive to the internal defect, such as voids insideor abnormal grain growth of sintered alumina, it is important to fabricate the defect-free product through the fabricationprocess. Powder injection molding (PIM) has been commonly applied for the fabrication of complex shaped products.Among the many parameters of PIM, the flowability of powder/binder mixture becomes more significant especially forthe shape of the cavity with thin thickness. Two different positions of the gate were applied during PIM using the disctype of die. The binder was removed by solvent extraction method and the brown compact was sintered at 1750oC for3 hours in a vacuum. The flowability was also simulated using moldflow (MPI 6.0) with two different types of gate.The effect of the flowability of powder/binder mixture on the microstructure of the sintered specimen was studied withthe analysis of the simulation result.
- URI
- http://db.koreascholar.com/Article?code=278210http://db.koreascholar.com/Search/Journal/IssueList?pub=6&jour=7http://hdl.handle.net/20.500.11754/46171
- ISSN
- 2287-8173; 1225-7591
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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