Effects of La2O3 addition on the microstructure and properties of activated sintered W-Ni compacts

Özge Balci*, O. Utku Demirkan, Duygu Aǧaoǧullari, Hasan Gökçe, Aziz Genç, M. Lütfi Öveçoǧlu, Ismail Duman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Citations (Scopus)

Abstract

In order to improve the properties of Ni activated sintered W compacts, La2O3 was added to a W-1 wt.% Ni matrix alloy. W-1 wt.% Ni-0.5 wt.% La2O3 and W-1 wt.% Ni-1 wt.% La2O3 composites were fabricated by mechanical alloying and activated sintering methods. The effects of La2O3 content and mechanical alloying duration on the microstructural and physical properties of activated sintered W-Ni compacts were investigated. The results showed that La2O3 particles have a significant effect on the density/microhardness values and wear amounts of the samples. The relative density value of 96.39 % and microhardness value of 4.08±0.28 GPa of W-1 wt.% Ni samples increased to respectively 98.09 % and 5.45±0.29 GPa with the addition of 1 wt.% La2O3. Wear rate of 3.26±0.81 (mm3N-1m-1)x10-9 of the W-1 wt% Ni samples decreased to 2.10±0.24 (mm3N-1m-1)x10-9 with the addition of 0.5 wt.% La2O3. Furthermore, grain sizes decreased and microhardness values increased with increasing mechanical alloying duration.

Original languageEnglish
Title of host publicationSolid Compounds of Transition Elements II
Pages217-221
Number of pages5
DOIs
Publication statusPublished - 2013
Event18th International Conference on Solid Compounds of Transtition Elements, SCTE 2012 - Lisbon, Portugal
Duration: 31 Mar 20125 Apr 2012

Publication series

NameSolid State Phenomena
Volume194
ISSN (Print)1012-0394

Conference

Conference18th International Conference on Solid Compounds of Transtition Elements, SCTE 2012
Country/TerritoryPortugal
CityLisbon
Period31/03/125/04/12

Keywords

  • Activated sintering
  • LaO
  • Mechanical alloying
  • W-Ni

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