• Title/Summary/Keyword: Al-B-C ternary system

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Preparation of Intermetallic Compound of Ternary Al-B-C System by Mechanical Alloying

  • Takahashi, Teruo;Yamashita, Michiru;Yamada, Kazutoshi;Kohzuki, Hidenori
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09b
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    • pp.1033-1034
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    • 2006
  • Metallic compound of ternary Al-B-C system was prepared by mechanical alloying (MA) using Al, boron and graphite powders as starting materials. MA was carried out using Spex 8000 mixer/mill for 50 hours in an argon atmosphere without process control reagent such as methyl alcohol. The MA powders obtained were heat-treated in vacuum at the temperature of 873 and 1273 K for 5 hour. Pure ternary Al-B-C compound was obtained in the chemical content of Al:B:C=55:27:18. The ternary compound obtained in this study has a new phase whose crystal structure is not identified yet.

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A computer simulation of the peso-scale microstructural evolution in the ternary Ni- ${Ni_3}Al-{Ni_3}V$ system (${Ni_3}Al-{Ni_3}V$ 준이원계 합금 포함 삼원계 시스템에서의 meso-scale 미세구조의 전산 모사에 관한 연구)

  • Park, Sung-Il;Lee, Hyuck-Mo
    • Korean Journal of Materials Research
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    • v.11 no.11
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    • pp.947-952
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    • 2001
  • The meso-scale microstructure of the $Ni-Ni_3Al- Ni_3V$ system is crucial to obtain both high strength and high toughness. Its evolution may be predicted with the aid of computer simulation of the compositional separation for heat-treated alloys. In this study, computer simulations of the hypothetical A-B-C ternary system, which is similar to the $Ni-Ni_3Al- Ni_3V$ system in terms of phase equilibria, have been performed using the kinetic modeling. Simulated morphologies were changed with nominal compositions and model parameters. It was showed the current model was useful and the more realistic model was proposed.

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THE ELECTROMAGNETIC PROPERTIES OF Mg-Mn FERRITES

  • Lee, D.Y.;Cho, S.I.;Shon, H.J.;Hur, W.D.
    • Journal of the Korean Magnetics Society
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    • v.5 no.5
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    • pp.552-555
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    • 1995
  • The magnetic properties of Mg-Mn ferrites were investigated in the composition range of $Mg_{a}Mn_{b}Fe_{c}O_{4\pm\delta}$ (a+b+c=3) with the addition of $Al_{2}O_{3}$. In $MgO-MnO-Fe_{2}O_{3}$ ternary system, the spinel single phase existed within the composition range of MgO-50 mol%, MnO-70 mol% and $Fe_{2}O_{3}-60\;mol%$. The saturation magnetic flux density increased with the increase of $Fe_{2}O_{3}$ content and showed the maximum at the stoichiometric composition of $(Mg,Mn)Fe_{2}O_{4}$. In $Mg_{x}Mn_{1-x}Fe_{2}O_{4}(x=0.2~0.8)$ system, the saturation magnetic flux density showed the maximum at $Mg_{0.2}Mn_{0.8}Fe_{2}O_{4}$. The addition of $Al_{2}O_{3}$ resulted in the decrease of saturation magnetic flux density but increased the electrical resistivity.

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