The effect of sintering conditions and ZrN volume fraction on the mechanical properties of spark plasma sintered W/ZrN composites

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Dongju Lee
  • Malik Adeel Umer
  • Yoochul Shin
  • Seokwoo Jeon
  • Soonhyung Hong

Detail(s)

Original languageEnglish
Pages (from-to)481-485
Journal / PublicationMaterials Science and Engineering A
Volume552
Online published30 May 2012
Publication statusPublished - 30 Aug 2012
Externally publishedYes

Abstract

In an effort to improve the room temperature mechanical properties of tungsten, W/ZrN composites were fabricated by high energy ball milling followed by spark plasma sintering at temperatures in a range of 1200-1700 °C under a pressure of 50. MPa. The effects of sintering conditions and ZrN volume fraction on the mechanical properties of the W/ZrN composites were studied and the results were compared to the properties of monolithic tungsten. The grain size of monolith tungsten and W/ZrN composites was found to increase with an increase in sintering temperature and time. In the case of the W/ZrN composites, ZrN particles led to an increase in the compressive strength of tungsten and a decrease in grain size. The increase in compressive strength of the composites was attributed to a reinforcement effect of ZrN particles as well as grain size refinement according to the Hall-Petch relation. Compressive strength of the composites increased with increasing ZrN content while the flexural strength decreased for samples with ZrN content exceeding 10. vol.%. This was attributed to the effects of ZrN agglomeration within the tungsten matrix.

Research Area(s)

  • Composites, Mechanical characterization, Powder metallurgy, Sintering

Citation Format(s)

The effect of sintering conditions and ZrN volume fraction on the mechanical properties of spark plasma sintered W/ZrN composites. / Lee, Dongju; Umer, Malik Adeel; Shin, Yoochul et al.
In: Materials Science and Engineering A, Vol. 552, 30.08.2012, p. 481-485.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review