Effects of vanadium carbide on sintered WC-10%Co produced by micro-powder injection molding

Wong Yee Ning, Norhamidi Muhamad, Abu Bakar Sulong, Abdolali Fayyaz, Muhammad Rafi Raza

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ultrafine, cemented tungsten carbide (WC) possesses exceptional hardness, wear resistance and high strength in various applications. In this study, WC was produced through micro powder injection molding (μPIM), which is also applicable for metals and ceramics in producing complex parts with high-dimensional accuracy. Different inhibitors, such as VC, Cr<inf>2</inf>C<inf>3</inf>, NbC, or TaC, were added to improve the mechanical properties of WC and control its grain growth. The effects of a grain growth inhibitor were investigated by adding VC in WC-10%Co-nVC, where n = 0 to 1.2 wt. %. The mechanical properties of the sintered part, such as hardness and flexural strength, were determined. The morphology and elemental distribution of the samples were studied by field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. X-ray diffraction was employed to study the phases of the obtained samples. The results showed that the sample with 0.4 wt. % VC (optimal amount) sintered at 1410°C exhibited the highest theoretical density, hardness and flexural strength of 95.2%, 1973±31 HV and 2586±172 MPa, respectively. The average grain size measured was 519±27 nm. VC acted as a grain growth inhibitor during sintering, thereby improving the mechanical properties.

Original languageEnglish
Pages (from-to)1175-1181
Number of pages7
JournalSains Malaysiana
Volume44
Issue number8
Publication statusPublished - 1 Aug 2015

Fingerprint

vanadium carbides
injection molding
inhibitors
hardness
flexural strength
mechanical properties
tungsten carbides
high strength
wear resistance
field emission
sintering
x rays
grain size
electron energy
ceramics
scanning electron microscopy
diffraction
metals
spectroscopy

Keywords

  • Flexure strength
  • Grain growth inhibitor
  • Micro powder injection moulding
  • Microstructure
  • XRD

ASJC Scopus subject areas

  • General

Cite this

Effects of vanadium carbide on sintered WC-10%Co produced by micro-powder injection molding. / Ning, Wong Yee; Muhamad, Norhamidi; Sulong, Abu Bakar; Fayyaz, Abdolali; Raza, Muhammad Rafi.

In: Sains Malaysiana, Vol. 44, No. 8, 01.08.2015, p. 1175-1181.

Research output: Contribution to journalArticle

Ning, Wong Yee ; Muhamad, Norhamidi ; Sulong, Abu Bakar ; Fayyaz, Abdolali ; Raza, Muhammad Rafi. / Effects of vanadium carbide on sintered WC-10%Co produced by micro-powder injection molding. In: Sains Malaysiana. 2015 ; Vol. 44, No. 8. pp. 1175-1181.
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