Effect of space holders on fabrication of porous titanium alloy-hydroxyapatite composite through powder injection molding

Farrahshaida Mohd Salleh, Abu Bakar Sulong, Muhammad Rafi Raza, Norhamidi Muhamad, Lim Tsiu Fhang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Powder injection molding (PIM) is able to produce porous titanium alloy/hydroxyapatite composite through the space holder technique. Thermal debinding and sintering processes were the main challenges due to different properties of metal and ceramic in producing such composite. This study focused on the effect of different space holders on the physical and mechanical properties of debound and sintered porous titanium aloi/hydroxyapatite composite. The feedstock is containing of 80 wt. % of titanium alloy/hydroxyapatite with 20 wt. % of space holders such as sodium chloride (NaCl) and polymethylmethacrylate (PMMA), respectively. The binders were then removed from the injected samples by two stages of debinding; solvent and thermal debinding. The sintering was performed at three different temperatures 1100oC, 1200oC and 1300oC at a heating rate of 10oC/min and holding time of 5 h. It was found that the samples containing PMMA space holder was fractured after sintering. While, the samples containing NaCl space holder successfully formed pores and not fractured. At sintering temperature of 1300oC, the density, compressive strength and porosity volume percentages for the sintered sample containing NaCl space holder were 3.05 g/cm3, 91.7 MPa. and 11.9 vol%, respectively.

Original languageEnglish
Pages (from-to)1651-1657
Number of pages7
JournalSains Malaysiana
Volume46
Issue number9
DOIs
Publication statusPublished - 1 Sep 2017

Fingerprint

Hydroxyapatite
Titanium alloys
Injection molding
Sintering
Powders
Fabrication
Composite materials
Sodium chloride
Heating rate
Density (specific gravity)
Feedstocks
Compressive strength
Binders
Physical properties
Titanium
Porosity
Mechanical properties
Temperature
Metals
Hot Temperature

Keywords

  • Hydroxyapatite
  • Metal Foam
  • Powder Injection Molding
  • Space Holder
  • Titanium Alloy

ASJC Scopus subject areas

  • General

Cite this

Effect of space holders on fabrication of porous titanium alloy-hydroxyapatite composite through powder injection molding. / Salleh, Farrahshaida Mohd; Sulong, Abu Bakar; Raza, Muhammad Rafi; Muhamad, Norhamidi; Fhang, Lim Tsiu.

In: Sains Malaysiana, Vol. 46, No. 9, 01.09.2017, p. 1651-1657.

Research output: Contribution to journalArticle

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