Articles
  • Properties and rapid consolidation of binderless nanostuctured tantalum carbide by pulsed current activated sintering 
  • In-Jin Shona,b, Byung-Ryang Kima, In-Yong Koa,*, Kee-Seok Namc and Jung-Mann Dohd
  • a Division of Advanced Materials Engineering and the Research Center of Advanced Material Development, Engineering College, Chonbuk National University, 561-756, Republic of Korea b Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University, 561-756, Republic of Korea c Korea Institute of Materials Science 531 Changwondaero, Changwon, Gyeongnam, 641-831, Korea d Advanced Functional Materials Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
Abstract
The grain size of TaC decreases with an increase in ball mliing time. Nanopowder of TaC was fabricated by high energy ball milling for 10 h. A densely pure TaC hard material with a relative density of up to 96% was produced with simultaneous application of 80 MPa pressure and pulsed current within 2 minutes. The density and hardness of TaC increased with a decrease in the initial TaC powder size. The fracture toughness and hardness values of TaC obtained from 10 h milled powder were 6.8 MPa.m(1/2) and 2076 kg/mm(2), respectively under 80 MPa pressure and with a pulsed current of 2800A.

Keywords: Sintering; Nanophase; Hardness; Toughness; TaC

This Article

  • 2010; 11(4): 498-502

    Published on Aug 31, 2010