Oxidation of Molten Al–Mg Alloys

• Haginoya Ikuo

  The Tokyo Metropolitan Industrial Technology Center

• Fukusako Tatsuichi

  Faculty of Engineering, Osaka University

Bibliographic Information

Other Title

• Oxidation of Molten Al–Mg Alloys

Abstract

The oxidation mechanism of molten Al–Mg alloys was studied by means of a thermal balance, X-ray diffraction and EPMA. Oxides produced in the Al–Mg (2–12%) alloys oxidized at 923 K to 1173 K for 10.8 ks (3 h) were MgO or/and MgAl₂O₄. MgO was produced in an early stage of oxidation, and its amount increased temporarily and then decreased gradually. MgAl₂O₄ increased gradually in amount with decreasing amount of MgO. The oxidation reactions were indicated by the equations, Mg+1/2O₂→MgO and MgO+2Al+3/2O₂→MgAl₂O₄, which were the consecutive reaction. MgO was produced in the form of granules around pores opened to the alloy surface and was irregularly distributed near the surface of the molten alloy. MgAl₂O₄ crystallized into a spinel structure from amorphous oxide and formed a homogeneously mixed layer composed of the fine oxide particles and metal.

Journal

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 24 (9), 613-619, 1983

  The Japan Institute of Metals

Keywords

• molten alloys
• high temperature oxidation
• aluminum-magnesium alloys
• oxidation mechanism
• thermal balance
• X-ray diffraction
• electron probe micro analysis
• magnesium oxide
• magnesium spinel

Details

• CRID: 1390282680095436928
• NII Article ID: 130003486097
• DOI: 10.2320/matertrans1960.24.613
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/24/9/24_9_613/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed