Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/17493
ชื่อเรื่อง: Microstructure and properties of zirconia-alumina composites fabricated via powder injection molding
ผู้แต่ง: Saelee N.
Chuankrerkkul N.
Wanakamol P.
วันที่เผยแพร่: 2021
บทคัดย่อ: This study aimed to fabricate zirconia-alumina composites via powder injection molding and investigate the effects of alumina addition on microstructure as well as physical properties of the composites. Zirconia-alumina composites were prepared using polyethylene glycol (PEG) and polyvinyl butyral (PVB) as binders. The powder loading was fixed at 38 vol%, and PEG: PVB binder weight ratio was fixed at 80:20. Alumina content within ceramic component was varied at 0, 10, 20, 30, 40 and 50 vol% to observe the effect of alumina on the composite structures and properties. The injection molding was done at 190℃ followed by water debinding of PEG at 40℃. Thermal debinding of PVB at 450℃ was performed prior to sintering at 1450℃. From the density measurement via Archimedes’ method, the relative density of sintered samples was found to be highest at 10 vol% alumina and gradually lower at higher alumina content. The condition with highest density yielded the highest flexural modulus and flexural strength. XRD indicated that tetragonal zirconia phase coexisted with alumina when alumina was added. Above 20 vol% alumina, monoclinic zirconia was also detected. The increased porosity in samples with high alumina content, as confirmed in SEM morphological observation, correlated with lower flexural strength and lower flexural modulus. The results illustrated the feasibility of powder injection molding in the production of zirconia-alumina composites and the optimum condition in this study was 10 vol% alumina. © 2021
URI: https://ir.swu.ac.th/jspui/handle/123456789/17493
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104254426&doi=10.14456%2fjmmm.2021.10&partnerID=40&md5=3dc2ef4d231b9a6ac4c7e820b6084968
ISSN: 8576149
Appears in Collections:Scopus 1983-2021

Files in This Item:
There are no files associated with this item.


Items in SWU repository are protected by copyright, with all rights reserved, unless otherwise indicated.