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Metallurgical and Materials Transactions A

, Volume 29, Issue 5, pp 1509–1516 | Cite as

The effect of tungsten particle size on the processing and properties of infiltrated W-Cu compacts

  • W. S. Wang
  • K. S. Hwang
Article

Abstract

Three tungsten powders with average particle sizes of 8.7, 23.2, and 65.2 µm were used to make W-15Cu compacts. The compacting pressure and sintering temperature were adjusted for each powder to attain the desired skeleton density. Sintered skeletons were then infiltrated with oxygen-free copper at 1200 °C in hydrogen and in vacuum. Results showed that as the tungsten particle size decreased, higher compacting pressures and sintering temperatures were required for the same desired skeleton density. The processing parameters and the tungsten particle size caused variations in the amount of closed pores and the W-W contiguity, which in turn resulted in different infiltrated densities and resistivities. Direct infiltration on green compacts was also examined, and higher infiltration densities and lower electrical resistivities were obtained compared to those obtained by infiltrating sintered compacts. These results are discussed based on infiltrated density, differences in microstructure, and the W-W contiguity.

Keywords

Material Transaction Sinter Temperature Copper Powder Green Compact Tungsten Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 1998

Authors and Affiliations

  • W. S. Wang
    • 1
  • K. S. Hwang
    • 1
  1. 1.the Institute of Materials Science and EngineeringNational Taiwan UniversityTaipeiTaiwan 106, Republic of China

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