Binding Mechanism and Shrinkage Prediction of Polypropylene, Polyethylene and Silica Particles in Isothermal Sintering Process
Abstract Combination between sintering process and automation system has proven to be a manufacturing process that can produce mechanical parts with high geometric complexity. However on the development of various materials, varying material in one part has not been studied by many researchers. In a...
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| Format: | Article NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2007
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| Online Access: | https://repository.ugm.ac.id/25720/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=8720 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Abstract
Combination between sintering process and automation system has proven to be a
manufacturing process that can produce mechanical parts with high geometric complexity.
However on the development of various materials, varying material in one part has not been
studied by many researchers. In addition the uniformity of strength and shrinkage aspects are
problems that have not been perfectly solved. Based on these reasons, research of binding
mechanism and the shrinkage prediction of particles on sintering process are importantly
conducted.
In this research, binding mechanisms were observed in isothermal sintering. Materials were
used polypropylene, polyethylene and silica, while the occurring shrinkage prediction used
polypropylene material. The images of in situ sintering process were observed by optical
microscope camera with magnitude of 100x. Based on these images data, the equivalent
diameter can be determined with projection area method and then, the shrinkage prediction can
be calculated.
The results show that the mechanism ofsintering of polypropylene and polyethylene is solid
state sintering. During sintering, the expansion of dimension of polyethylene particle is greater
than that of polypropylene. In sintering process between polyethylene and silica, the lower
melting temperature particle (polyethylene) is as the driving binding among silica particles
From shrinkage prediction, the final stage of polyethylene sintering at temperature of 11if C
and holding time of 780 s yields shrinkage of20.47%.
Keywords: binding mechanism, shrinkage, sintering, polyethylene, polypropylene |
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