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Ordering in palladium-silver alloys.

Windisman, Robert Michael.

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Ordering in palladium-silver alloys.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Ordering in palladium-silver alloys./
Author:	Windisman, Robert Michael.
Description:	83 p.
Notes:	Source: Masters Abstracts International, Volume: 31-03, page: 1245.
Contained By:	Masters Abstracts International31-03.
Subject:	Chemistry, Physical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MM73982
ISBN:	9780315739826

Ordering in palladium-silver alloys.
Windisman, Robert Michael.

Ordering in palladium-silver alloys. - 83 p.

Source: Masters Abstracts International, Volume: 31-03, page: 1245.

Thesis (M.A.Sc.)--University of Toronto (Canada), 1992.

The ordering behavior of the PdAg alloy system was studied. It was placed into three theoretical schemes: (1) empirical trends based on electron to atom ratios, (2) the model of Sato and Toth and (3) the calculations of Vul' and Krivoglaz, the last two rely on Fermi surface concepts. These three schemes predict similar results: PdAg alloys are a fair candidate for ordering behavior with superperiod M = 1.4 for 70/30 alloys. A low value of M means that there will be a high density of antiphase boundaries.

ISBN: 9780315739826Subjects--Topical Terms:

560527
Chemistry, Physical.

Ordering in palladium-silver alloys.
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005 20061114122314.5
008 130610s1992 eng d
020 $a 9780315739826
035 $a (UnM)AAIMM73982
035 $a AAIMM73982
040 $a UnM $c UnM
100 1 $a Windisman, Robert Michael. $3 1910952
245 1 0 $a Ordering in palladium-silver alloys.
300 $a 83 p.
500 $a Source: Masters Abstracts International, Volume: 31-03, page: 1245.
502 $a Thesis (M.A.Sc.)--University of Toronto (Canada), 1992.
520 $a The ordering behavior of the PdAg alloy system was studied. It was placed into three theoretical schemes: (1) empirical trends based on electron to atom ratios, (2) the model of Sato and Toth and (3) the calculations of Vul' and Krivoglaz, the last two rely on Fermi surface concepts. These three schemes predict similar results: PdAg alloys are a fair candidate for ordering behavior with superperiod M = 1.4 for 70/30 alloys. A low value of M means that there will be a high density of antiphase boundaries.
520 $a Resistance and X-ray measurements were made but no evidence indicating ordered structures was found. The alloys showed no dramatic drop in resistance when cooling from room temperature to 77K contrary to what was expected based on previous work by Huang and Frame. The crystal structure was found to be f.c.c. and obeyed Vegard's law upon alloying. Heat treatment did not reproduce Savitskii's high temperature ordered phases. Thus ordering of the PdAg alloy system is problematic since residual lattice strain, small crystallite size, or lack of homogeneity may mask the transition if the antiphase boundary energy is on the order of the electronic driving force.
590 $a School code: 0779.
650 4 $a Chemistry, Physical. $3 560527
650 4 $a Engineering, Metallurgy. $3 1023648
690 $a 0494
690 $a 0743
710 2 0 $a University of Toronto (Canada). $3 1017674
773 0 $t Masters Abstracts International $g 31-03.
790 $a 0779
791 $a M.A.Sc.
792 $a 1992
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MM73982