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Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part

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Main Authors: Farhana, Mohd Foudzia, Norhamidi, Muhamada, Abu Bakar, Sulong, Hafizawati, Zakaria
Other Authors: abubakar@eng.ukm.my
Format: Article
Language:English
Published: Elsevier 2014
Subjects:
Mechanical properties
Micro ceramic injection molding (μCIM)
Nano sized zirconia
Rheological properties
Online Access:http://dspace.unimap.edu.my:80/dspace/handle/123456789/32492
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spelling my.unimap-324922014-03-10T14:33:13Z Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part Farhana, Mohd Foudzia Norhamidi, Muhamada Abu Bakar, Sulong Hafizawati, Zakaria abubakar@eng.ukm.my Mechanical properties Micro ceramic injection molding (μCIM) Nano sized zirconia Rheological properties Link to publisher's homepage at http://www.elsevier.com/ Micro Ceramic Injection Molding (μCIM) is a near net-shape process to produce smaller and intricate parts at a competitive cost. The application of nano-sized ceramic powder in μCIM has the advantages of fine grain size growth and good surface finish. However, the nano size effect causes agglomeration and low powder loadings, which result in defects during the μCIM process and in the sintered components. This study extensively investigated the debinding and sintering of yttria-stabilized zirconia (YSZ), as well as its rheological properties, using polypropylene (PP) as the primary binder and palm stearin as the secondary binder. 50 nm Yttria stabilized zirconia (YSZ) powders were mixed with palm stearin and PP at a powder loading of 37–43 vol%. The results of rheological studies showed that the feedstock had a dilatant flow characteristic and a viscosity of around 10–40 Pa s. Feedstock with 38 vol% powder loading had the lowest activation energy of 9.48 kJ/mol. The green part of the injected feedstock had flexural strength ranging from 13 to16 MPa, within which the feedstock with 43 vol% powder loading had the highest green density. Solvent debinding was carried out at three temperatures (50, 60, and 70 °C) using heptane. A large porous region was clearly identified at 70 °C compared with 50 °C. A debinding split furnace with argon gas was used to remove PP at 450 °C for 4 h. The debound samples did not shrink when 94%–98% of the binder system was removed. All debound samples sintered at 1350 °C and 41 vol% had the highest mechanical properties with hardness of 900 HV and a flexural strength of 400 MPa. 2014-03-10T14:33:13Z 2014-03-10T14:33:13Z 2013-04 Article Ceramics International, vol.39 (3), 2013, pages 2665-2674 0272-8842 http://dspace.unimap.edu.my:80/dspace/handle/123456789/32492 http://www.sciencedirect.com/science/article/pii/S0272884212008838 http://dx.doi.org/10.1016/j.ceramint.2012.09.033 en Elsevier
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Mechanical properties
Micro ceramic injection molding (μCIM)
Nano sized zirconia
Rheological properties
spellingShingle Mechanical properties
Micro ceramic injection molding (μCIM)
Nano sized zirconia
Rheological properties
Farhana, Mohd Foudzia
Norhamidi, Muhamada
Abu Bakar, Sulong
Hafizawati, Zakaria
Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
description Link to publisher's homepage at http://www.elsevier.com/
author2 abubakar@eng.ukm.my
author_facet abubakar@eng.ukm.my
Farhana, Mohd Foudzia
Norhamidi, Muhamada
Abu Bakar, Sulong
Hafizawati, Zakaria
format Article
author Farhana, Mohd Foudzia
Norhamidi, Muhamada
Abu Bakar, Sulong
Hafizawati, Zakaria
author_sort Farhana, Mohd Foudzia
title Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
title_short Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
title_full Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
title_fullStr Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
title_full_unstemmed Yttria stabilized zirconia formed by micro ceramic injection molding: Rheological properties and debinding effects on the sintered part
title_sort yttria stabilized zirconia formed by micro ceramic injection molding: rheological properties and debinding effects on the sintered part
publisher Elsevier
publishDate 2014
url http://dspace.unimap.edu.my:80/dspace/handle/123456789/32492
_version_ 1643796921968492544
score 13.214268

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