Properties of the pulsed electric current sintered Ni-Mn-Ga-Co-WC composites

Frans Nilsen*, Ilkka Aaltio, Yanling Ge, Outi Söderberg, Illya Glavastkyy, Mika Lahelin, Ryuji Maki, Simo-Pekka Hannula

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Two double dispersion composites were prepared by pulsed electric current sintering (PECS) from two powders on Ni-Mn-Ga-Co/WC-Co system. Composite I consists of 90 vol% WC-12Co and 10 vol% of non-modulated Ni-Mn-Ga-Co martensite and Composite 2 of 18 vol% of WC-12Co and 82 vol% of 10 M Ni-Mn-Ga-Co martensite. Damping capabilities of both composites were studied with DMA and cavitation erosion resistance tests. Both composites show promise as candidates as damping element materials when high hardness and wear resistance is required but Composite 2 had a higher damping capability. The high damping ability of composites are proposed to be derived from the combined effect of energy dissipation by twin boundary movement in the Ni-Mn-Ga matrix combined with the high hardness and wear resistance arising from the tungsten carbides. (C) 2015 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)408-415
Number of pages8
JournalJournal of Alloys and Compounds
Volume656
DOIs
Publication statusPublished - 25 Jan 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Ni-Mn-Ga
  • Tungsten carbide
  • Composite
  • Pulsed electric current sintering
  • Magnetic materials
  • Mechanical damping
  • MEMORY ALLOY
  • GA/POLYMER COMPOSITES
  • TEMPERATURE-DEPENDENCE
  • COATINGS
  • MATRIX
  • SMART

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