ISSN:
1662-9752
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 effects of partial replacements of Zr by Y in the alloy Ni〈sub〉60〈/sub〉Zr〈sub〉25-x〈/sub〉Al〈sub〉8〈/sub〉Y〈sub〉x〈/sub〉(x=0 and 7 at %) on the crystallization behaviors of amorphous alloys were studied using isothermally heattreated ribbons. With the partial replacement, the supercooled liquid region upon continuous heating was significantly extended indicating that crystallization can be effectively suppressed by the optimum amount of Zr replacement by Y. The first phase appeared during crystallization was identified as the ternary compound AlNi〈sub〉2〈/sub〉Zr while the single exothermic event could be observed upon heating the amorphous ribbons. The AlNi〈sub〉2〈/sub〉Zr phase was decomposed into binary compounds upon further heating. Therefore, the extended supercooled liquid region of the alloy Ni〈sub〉60〈/sub〉Zr〈sub〉25〈/sub〉Al〈sub〉8〈/sub〉Y〈sub〉7〈/sub〉 was attributed to the suppression of AlNi〈sub〉2〈/sub〉Zr phase formation by the partial replacement of Zr by Y. The effects of Y on the crystallization behaviors were discussed on the basis of atomic configuration of the supercooled liquid
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/08/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.449-452.941.pdf
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