Master Sintering Curve를 이용한 분말 사출 성형 된 STS316L과 STS17-4PH의 입자 크기에 따른 소결 특성 연구
- Master Sintering Curve를 이용한 분말 사출 성형 된 STS316L과 STS17-4PH의 입자 크기에 따른 소결 특성 연구
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- In rapidly evolving powder injection molding technology, the wideprevalence
of various microstructures demands the powders of smaller
particle sizes. The effects of particle sizes on the sintering behavior are
critical to not only shape retention of microstructures but also their
mechanical properties. This thesis investigates the effects of three different
particle sizes on the sintering behavior of the 316L stainless steel (STS316L)
and 17-4PH stainless steel (STS17-4PH) samples, prepared by powder
injection molding, using the theory of master sintering curve. For this
purpose, the STS316L and STS17-4PH powders of three different mean
particle sizes, i.e., 3, 4, and 8 μm, has been produced. The samples for the
dilatometry experiment have been prepared through powder-binder mixing,
injection molding, and solvent and thermal debinding. Dilatometry
experiments have been carried out on the samples in a H2 atmosphere at three
different heating rates of 3, 6, and 10 °C/min.
The shrinkage data obtained by dilatometry experiments has been analyzed to
understand the densification and the sintering behaviors in terms of particles
sizes and heating rates. Master sintering curve (MSC) model has been used to
quantify the effects of particles sizes.
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