ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The Zincalume hot-dip coating process is a well-established technique for excellent corrosionprotection of steel products. This paper describes the study of two intermetallics based on the Fe-Al-Si-Zn alloy system, α-AlFeSi and α-AlFeSi(+Zn), pertinent to the Zincalume process. Theseintermetallics are difficult to characterize in-situ due to their formation at high temperature andbecause they form as very thin intermetallic layers on a steel substrate, which inhibits accuratequantitative analysis. Controlled magneto-ball milling and hot-pressing have been employed in anattempt to synthesise these intermetallic compounds.Magneto-ball milling, under a He atmosphere, was conducted in shearing mode to enable controlledmilling of elemental powders, namely Zn and Al, without the excessive cold-welding oftenassociated with milling of ductile powders with high coefficients of surface friction. XRD analysisindicated that uniform mixtures of highly reactive fine-structured powders were produced, asindicated by diffuse elemental peaks of low intensity. Hot-pressing was utilized to sinter thepowders into compact intermetallic compounds without sintering aids. The intermetallics werecharacterized by DTA, XRD and elemental contrast mapping performed on an SEM with EDS
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.1032.pdf
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