Zobrazeno 1 - 10
of 56
pro vyhledávání: '"D. D. Perovic"'
Publikováno v:
Materials Science and Technology. 24:245-249
The quasi-peritectic reaction, frequently observed in ternary alloy systems, takes the form L + α↔β + γ, where L indicates the liquid phase, and α, β and γ indicate solid phases. The formation of microstructure resulting from the kinetics of
Publikováno v:
Materials Science and Technology. 23:1161-1166
A new solder alloy, intended to replace eutectic Sn–Pb, consists of the near eutectic alloy 93 wt-%Sn plus 7 wt-%Zn, with approximately 60 ppm Al added to prevent excessive oxidation of the Zn component. On solidification, this alloy forms a broken
Publikováno v:
Materials Science and Technology. 23:432-437
A metallographic study is reported of the phases and reactions that occur in Ag–In–Sn (Pb-free) solder alloys containing approximately 3 wt-%Ag and up to 10 wt-%In. Specimens were prepared by very slow unidirectional solidification and as small c
Publikováno v:
Materials Science and Technology. 22:899-902
Using the 'solidification path' technique, the liquidus projection of Sn rich corner of the Cu–Ni–Sn phase diagram was determined. Two quasi-peritectic reactions were found, which are related to the Cu–Sn and Ni–Sn binary eutectic reactions i
Publikováno v:
Materials Science and Technology. 21:53-60
To investigate the minimum superheat necessary to solder components on printed circuit boards successfully using 95.5 wt-%Sn, 3.8 wt-%Ag, 0.7 wt-%Cu solder, experiments were carried out using separate solder balls of the type used in ball grid arrays
Publikováno v:
Materials Science and Technology. 21:61-68
The effect of cooling rate on the formation of Sn dendrites during freezing was investigated for Pb free solder alloys having compositions near the Sn rich ternary eutectic of the Ag–Cu–Sn system. For Ag and Cu concentrations less than eutectic,
Publikováno v:
Materials Science and Technology. 19:866-874
The reaction of liquid tin with solid copper has been studied by heating small volumes ofpure tin on copper coupons at various temperatures and times, and evaluating the resulting reaction metallographically. Three reaction temperatures were used:260
Publikováno v:
Materials Science and Technology. 19:11-19
Experimental alloy 2090 (Al – 2.1Li – 2.6Cu – 0.4Mn) was deformed in torsion and compression at temperatures T=300, 400, and 500°C and strain rates e=10–2 to 10 s–1. The torsion and compression results were analysed using equation A(sinh
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 19:1862-1867
Island size distributions of three-dimensional Si1−xGex/Si(001) islands of varying Ge fractions (x=0.4–0.7) and thicknesses grown by ultrahigh vacuum chemical vapor deposition are studied. Size distributions for percolating islands obey the dynam
Publikováno v:
Philosophical Magazine A. 81:1041-1064
Detailed analysis of Burgers vectors and line directions has been carried out on three types of dislocation defect (called X, Y and single loops) formed in lowmisfit Ge x Si 1-x /Si(001) heterostructures, grown under conditions of planar interface gr