Fabrication of miniature parts using nano-sized powders and an environmentally friendly binder through micro powder injection molding

Javad Rajabi, Hafizawati Zakaria, Norhamidi Muhamad, Abu Bakar Sulong, Abdolali Fayyaz

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Component miniaturization is increasingly gaining importance in numerous microsystem technologies, including medical technology, biotechnology, and drive technology. In this study, two types of nano-sized powder, namely, metal (stainless steel 316L) and ceramic (yttria-stabilized zirconia), were used to fabricate miniature parts through micro powder injection molding. Micro parts were produced by mixing powders with a binder system, followed by injection, debinding, and sintering process. Partially water-soluble binder system with surfactant addition was used to mix with either stainless steel 316L or yttria-stabilized zirconia nanopowder to form feedstock to avoid the agglomeration of fine powder and environmentally hazardous organic binder. The polyethylene glycol loss in water was observed after a rapid removal period in the first 60 min of immersion for the micro parts. Approximately 99 % of the polymethyl methacrylate binder was removed after pyrolysis at 450 °C for 2.5 h. Sintered ceramic and metallic parts showed a relative density that is approximately 97 % of theoretical density and free of defects. Hardness of approximately 221 and 1,200 Hv was achieved for the fabricated micro parts using stainless steel 316L and yttria-stabilized zirconia powders, respectively.

Original languageEnglish
Pages (from-to)1131-1136
Number of pages6
JournalMicrosystem Technologies
Volume21
Issue number5
DOIs
Publication statusPublished - 1 May 2015

Fingerprint

injection molding
Injection molding
Powders
Binders
Yttria stabilized zirconia
Stainless Steel
yttria-stabilized zirconia
Fabrication
stainless steels
fabrication
Stainless steel
ceramics
metal powder
biotechnology
Water
Powder metals
Microsystems
miniaturization
Polymethyl Methacrylate
Biotechnology

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Hardware and Architecture
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Fabrication of miniature parts using nano-sized powders and an environmentally friendly binder through micro powder injection molding. / Rajabi, Javad; Zakaria, Hafizawati; Muhamad, Norhamidi; Sulong, Abu Bakar; Fayyaz, Abdolali.

In: Microsystem Technologies, Vol. 21, No. 5, 01.05.2015, p. 1131-1136.

Research output: Contribution to journalArticle

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