Preparation of Mg-Li-Al-Zn master alloy in air by electrolytic diffusing method

Meng Chang Lin, Jun Yen Uan

研究成果: 雜誌貢獻文章同行評審

8 引文 斯高帕斯(Scopus)

摘要

Electrolytic diffusing method was conducted at 500°C to prepare Mg-Li-Al-Zn master alloy in air. It was also explored for the melting and casting of Mg-Li alloy in air, as the Mg-Li-Al-Zn master alloy used as raw material. A mixture of 45 mass% lithium chloride (LiCl) and 55mass% potassium chloride (KCl) was employed as the electrolyte. Mg-9mass%Al-1 mass% Zn (AZ91) alloy was used as cathode material while graphite selected as anode. Experimental results showed that the electrolysis current linearly depended on the applied working voltage. Deposition of lithium occurred on the cathode surface. After the electrolysis experiments, Mg-12mass% Li-9mass% Al-1 mass% Zn alloy sheet can be obtained. At working voltage of 4.2 V and one hour electrolysis, the hexagonal-closed-pack AZ91D sheet (1.5-mm thickness) was fully converted to body-centered-cubic Mg-Li-Al-Zn alloy. The formation of Mg-Li phase during electrolysis was studied by inductively coupled plasma-atomic emission spectrometer (ICP), X-ray diffraction, and optical microscopy. It is diffusion rather than deposition rate (electrolysis current) that controlled the depth of Mg-Li phase formed in the cathode sample. The Mg-Li-Al-Zn alloy used as master alloys could be melted and casted in air without ignition. However, the content of lithium in the as-cast block was reduced to 3.77 mass%, properly due to oxidation of lithium metal during melting.
原文英語
頁(從 - 到)1354-1359
頁數6
期刊Materials Transactions
46
發行號6
DOIs
出版狀態已發佈 - 6月 2005
對外發佈

ASJC Scopus subject areas

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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