Tribological properties of magnesium composite alloy with in-situ synthesized Mg2Si dispersoids

Katsuyoshi Kondoh, Hideki Oginuma, Tatsuhiko Aizawa

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15 Citations (Scopus)

Abstract

The tribological properties of the magnesium composite alloys reinforced with solid-state synthesized Mg2Si or Mg2Si/MgO dispersoids are evaluated under wet conditions (in engine oil lubricants) by using pin on disc type wear test equipment. Every composite shows a dependence of the friction coefficient on the applied load, which corresponds to Sribeck diagram based on elasto-hydrodynamic lubrication (EHL). The increase of Mg2Si content causes the increase of both the friction coefficient and the total wear by plowing, because Mg2Si dispersoids protruded from the surface are much harder than S35C mild steel counter material. When including MgO dispersoids formed in deoxidizing SiO2 particles by magnesium, the friction coefficient reduces to 0.01-0.02 in oil lubricant. This is due to the "mild offensive effect" by MgO dispersoids which ease the attacking or plowing phenomenon on the counter material, because they are not so hard.

Original languageEnglish
Pages (from-to)524-530
Number of pages7
JournalMaterials Transactions
Volume44
Issue number4
Publication statusPublished - 2003 Apr
Externally publishedYes

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Keywords

  • Abrasive
  • Composite
  • Magnesium
  • MgSi
  • MgO
  • Silicon
  • SiO
  • Synthesis
  • Tribolo gy

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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