Development of nanometer scale engineering powder components by controlling their microstructure

Τίτλος

Development of nanometer scale engineering powder components by controlling their microstructure

Θέμα

Nanostructures--Industrial applications

Thermodynamics

Δημιουργός

Shadi, Agha

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού.

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

2003

Συνεισφέρων

Angastiniotis, Nicos

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.

Μορφή

pdf

Γλώσσα

en

Τύπος

text

Αναγνωριστικό

MED0562

Σύνοψη

The trend to smaller and smaller structure, that is, miniaturization, is well mown in the manufacturing and microelectronics industries, as evidenced by the rapid increase in computing power through reduction on chips of the area and volume needed per transistor (Roher 1993). In the materials area this same trend towards miniaturization also is occurring, but for different reasons. Smallness itself is not the goal. Instead, it is the realization:t or now possibly even the expectation, those new properties intrinsic to novel structures will enable breakthroughs in a multitude of technologically important areas (Siegel 1991; Gleiter 1989).
Of particular interest to scientists is the fact that nanostructures have higher surface areas than do conventional materials. The impact of nanostructure on the properties of high surface area materials is an area of increasing importance to understanding, creating, and improving materials for diverse applications. High surface areas can be attained either by fabrications small particles or clusters where the surface-tovolume ratio of each particle is high, or by creating materials where the void surface area (pores) is high compared to the amount of bulk support material. Materials such as highly dispersed supported metal catalysts and gas phase clusters fall into the former category, and microporous (nanometer-pored) materials such as zoelites, high surface area inorganic oxides, porous carbons, and amorphous silicas fall into latter category.