Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids

Katsuyoshi Kondoh, Hideki Oginuma, Tatsuhiko Aizawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The tribological properties of the magnesium composite alloys reinforced with solid-state synthesized Mg2Si or Mg2Si/MgO dispersoids are evaluated under wet and dry conditions by using pin on disc type wear test equipment. In the wet type wear test, every composites show 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. In the dry type wear test when using the ADC12 aluminum alloy disks as the counter material, Mg2Si and MgO dipsersoids also show the same effect to reduce the abrasive wear phenomenon. It is also clarified that the graphite particles embedded in the magnesium matrix prevent the fluctuation of the friction coefficient by the formation of the self-lubrication films between the pin and disk specimens.

Original languageEnglish
Title of host publicationMaterials Science and Technology 2003 Meeting
EditorsA.B. Pandey, K.L. Kendig, J.J. Lewandowski, S.S. Shah
Pages91-101
Number of pages11
Publication statusPublished - 2003
Externally publishedYes
EventMaterials Science and Technology 2003 Meeting - Chicago, IL
Duration: 2003 Nov 92003 Nov 12

Other

OtherMaterials Science and Technology 2003 Meeting
CityChicago, IL
Period03/11/903/11/12

Fingerprint

Magnesium
Wear of materials
Friction
Composite materials
Lubrication
Graphite
Abrasion
Carbon steel
Lubricants
Aluminum alloys
Oils
Hydrodynamics

Keywords

  • Magnesium
  • MgSi
  • MgO
  • Mild Offensive
  • Self-lubricant
  • Solid-state Synthesis

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Kondoh, K., Oginuma, H., & Aizawa, T. (2003). Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids. In A. B. Pandey, K. L. Kendig, J. J. Lewandowski, & S. S. Shah (Eds.), Materials Science and Technology 2003 Meeting (pp. 91-101)

Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids. / Kondoh, Katsuyoshi; Oginuma, Hideki; Aizawa, Tatsuhiko.

Materials Science and Technology 2003 Meeting. ed. / A.B. Pandey; K.L. Kendig; J.J. Lewandowski; S.S. Shah. 2003. p. 91-101.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kondoh, K, Oginuma, H & Aizawa, T 2003, Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids. in AB Pandey, KL Kendig, JJ Lewandowski & SS Shah (eds), Materials Science and Technology 2003 Meeting. pp. 91-101, Materials Science and Technology 2003 Meeting, Chicago, IL, 03/11/9.
Kondoh K, Oginuma H, Aizawa T. Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids. In Pandey AB, Kendig KL, Lewandowski JJ, Shah SS, editors, Materials Science and Technology 2003 Meeting. 2003. p. 91-101
Kondoh, Katsuyoshi ; Oginuma, Hideki ; Aizawa, Tatsuhiko. / Tribological Properties of Magnesium Composite with In-situ Formed Mg 2Si Dispersoids. Materials Science and Technology 2003 Meeting. editor / A.B. Pandey ; K.L. Kendig ; J.J. Lewandowski ; S.S. Shah. 2003. pp. 91-101
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AB - The tribological properties of the magnesium composite alloys reinforced with solid-state synthesized Mg2Si or Mg2Si/MgO dispersoids are evaluated under wet and dry conditions by using pin on disc type wear test equipment. In the wet type wear test, every composites show 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. In the dry type wear test when using the ADC12 aluminum alloy disks as the counter material, Mg2Si and MgO dipsersoids also show the same effect to reduce the abrasive wear phenomenon. It is also clarified that the graphite particles embedded in the magnesium matrix prevent the fluctuation of the friction coefficient by the formation of the self-lubrication films between the pin and disk specimens.

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