Flow Behaviour Characterization of Hydroxyapatite for Powder Injection Moulding (PIM) / Farrahshaida Mohd Salleh...[et al.]

Mohd Salleh, Farrahshaida and Sulong1, Abu Bakar and Foudzi1, Farhana and Mohamed1, Intan Fadhlina and Azaman1, Natasha Emira and Mas’ood1, Najlaa Nazihah and Seong, Jin Park (2017) Flow Behaviour Characterization of Hydroxyapatite for Powder Injection Moulding (PIM) / Farrahshaida Mohd Salleh...[et al.]. Journal of Mechanical Engineering (JMechE), SI 3 (1). pp. 77-88. ISSN 1823-5514 ; 2550-164X


The selection and formulation of binder systems play an important role in powder injection moulding (PIM). The rheological properties of feedstock need to be controlled due to preventing any formation of defects during injection, debinding and sintering. For this study, the Hydroxyapatite (HA) feedstock was prepared by mixing with 40 vol% Palm Stearin (PS) and 60 vol% Polyethelyne (PE) binder system. Three feedstocks (F1, F2 and F3) at different powder loadings of 54, 55 and 56 vol%, respectively, were mixed using brabender mixer. The rheological properties of feedstock such as flow behaviour index, flow activation energy, and mouldability of the feedstocks were determined with a capillary rheometer. It was found that, all feedstocks exhibited pseudoplastic flow, which is an important requirement in PIM. The three feedstock flow behaviour indexes were n (0.16-0.24), and flow activation energies; E at shear rate at 1000s-1 was 5.36, 6.91 and 14.35 kJ/mol. In addition, F3 was found to be able to be injected in a wide range of temperature due to its low-flow behaviour index, low activation energy, and high mouldability index gathered from the rheological test.


Item Type: Article
Email / ID Num.
Mohd Salleh, Farrahshaida
Sulong1, Abu Bakar
Foudzi1, Farhana
Mohamed1, Intan Fadhlina
Azaman1, Natasha Emira
Mas’ood1, Najlaa Nazihah
Seong, Jin Park
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: SI 3
Number: 1
Page Range: pp. 77-88
Keywords: powder injection moulding; Hydroxyapatite; Polyethelyne
Date: 2017
URI: https://ir.uitm.edu.my/id/eprint/38518
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