Thermal Properties Measurement Photoacoustic Technique for Hardmetals

F.A.L. Machado; Roberto da Trindade Faria Jr.; Marcello Filgueira; M.F. Rodrigues; Guerold Sergueevitch Bobrovinitchii; H. Vargas

doi:10.4028/www.scientific.net/MSF.530-531.41

Paper Titles

Grain Size of Commercial High Speed Steel
p.16

Porosity Study of Sintered Titanium Foams
p.22

Concentration Profiles and Iso-Concentration Curves for Batch Settling Using the Gamma Rays Attenuation Technique
p.29

Analysis of the Behavior of Solid-Liquid Systems Based on the Shape, Size Distribuition and Density of the Solid Particles
p.35

Thermal Properties Measurement Photoacoustic Technique for Hardmetals
p.41

An Overview of the Microstructures Present in High-Speed Steel -Carbides Crystallography
p.48

Microstructural Characterization of Equiatomic NiTi Alloy Prepared by High Energy Milling
p.53

Separation of Effects due to Superimposition Using the Rietveld Method in Spectra Obtained by WDXRF
p.59

Sintered Valve Seat Inserts – Microstructural Characterisation
p.65

HomeMaterials Science ForumMaterials Science Forum Vols. 530-531Thermal Properties Measurement Photoacoustic...

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.