Paper Title:
Thermal Properties Measurement Photoacoustic Technique for Hardmetals
  Abstract

The open photoacoustic cell technique (OPC) was carried out in order to measure the thermal diffusivity of hardmetal. Hardmetal is usually processed by the conventional powder technology techniques: mix of WC + Co powders, compacting, and liquid phase sintering A new method to process hardmetal parts is hereby described. Parts of WC-15%wt Co were processed by using high pressure – high temperature sintering. It was used the pressure of 5GPa, temperature of 1350 oC, and time of 2 minutes of sintering. In addition to the thermal diffusivity, heat capacity was considered and the thermal conductivity achieved. Results matched with the values of the literatures where others photoacoustic techniques have been employed. It was achieved a thermal capacity of 3.34J/cm3K, thermal diffusivity of 0.35cm2/s, and thermal conductivity of 116.9W/mK. It reveals that the HPHT processed WC- 15%wtCo hardmetal is able to work as a cutting tool, in the thermal point of view.

  Info
Periodical
Materials Science Forum (Volumes 530-531)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
41-47
DOI
10.4028/www.scientific.net/MSF.530-531.41
Citation
F.A.L. Machado, R. da T. Faria Jr., M. Filgueira, M.F. Rodrigues, G. S. Bobrovinitchii, H. Vargas, "Thermal Properties Measurement Photoacoustic Technique for Hardmetals", Materials Science Forum, Vols. 530-531, pp. 41-47, 2006
Online since
November 2006
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Price
$32.00
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