Effect of Soluble and Insoluble Zirconium on the Grain Refinement of Magnesium Alloys

Autor:	David H. StJohn, Ma Qian, M. T. Frost
Rok vydání:	2003
Předmět:	Zirconium Materials science Magnesium Mechanical Engineering Inorganic chemistry chemistry.chemical_element Hydrochloric acid equipment and supplies Condensed Matter Physics chemistry.chemical_compound chemistry Mechanics of Materials Nitric acid General Materials Science Magnesium alloy Ingot
Zdroj:	Materials Science Forum. :593-598
ISSN:	1662-9752
DOI:	10.4028/www.scientific.net/msf.419-422.593
Popis:	Wet chemical analyses of well-mixed fine drillings from a zirconium alloyed magnesium ingot showed that the resultant "soluble zirconium" was a function of the concentration of the hydrochloric or nitric acid that was used to digest the samples while the total zirconium could be readily and accurately determined. A solution containing 15 % of concentrated hydrochloric acid was used to determine the soluble zirconium. It was shown that insoluble zirconium that existed in the form of undissolved zirconium particles could play a positive role (similar to 30 %) in grain-refining magnesium and excellent grain refinement of magnesium alloys by zirconium depends on both soluble and insoluble zirconium in the melt immediately prior to pouring.
Databáze:	OpenAIRE
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