Melting behavior and origin of strain in ball-milled nanocrystalline Al powders

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Ball-milled aluminum powders have been investigated by differential scanning calorimetry and high resolution X-ray line profile analysis. Ball-milling was carried out for different milling times ranging from 45 min to 32 days. The milling time dependence of the average grain-size and of the density of lattice defects, mainly dislocations, were determined by the modified Williamson-Hall and Warren-Averbach procedures based on the dislocation model of mean square strain. Characteristic grain sizes of ball-milled Al-powders decreases with increasing milling time and simultaneously, the grain-size distribution becomes sharper. Calorimetric measurements indicated the decrease of the melting point, Tm with increasing milling time. The melting point depression was found to be proportional to inverse grain size. The strain accumulated in the powder particles is mainly caused by intergrain dislocations.

Original languageEnglish
Pages (from-to)1643-1646
Number of pages4
JournalJournal of Materials Science
Volume40
Issue number7
DOIs
Publication statusPublished - Apr 2005

Fingerprint

Nanocrystalline powders
Powders
balls
Melting
melting
grain size
Melting point
Crystal defects
Milling (machining)
Ball milling
melting points
Aluminum
Dislocations (crystals)
Differential scanning calorimetry
X rays
time dependence
heat measurement
aluminum
scanning
high resolution

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Melting behavior and origin of strain in ball-milled nanocrystalline Al powders. / Révész, A.

In: Journal of Materials Science, Vol. 40, No. 7, 04.2005, p. 1643-1646.

Research output: Contribution to journalArticle

@article{694c0a6bf326445ab02f442d8bd78bd7,
title = "Melting behavior and origin of strain in ball-milled nanocrystalline Al powders",
abstract = "Ball-milled aluminum powders have been investigated by differential scanning calorimetry and high resolution X-ray line profile analysis. Ball-milling was carried out for different milling times ranging from 45 min to 32 days. The milling time dependence of the average grain-size and of the density of lattice defects, mainly dislocations, were determined by the modified Williamson-Hall and Warren-Averbach procedures based on the dislocation model of mean square strain. Characteristic grain sizes of ball-milled Al-powders decreases with increasing milling time and simultaneously, the grain-size distribution becomes sharper. Calorimetric measurements indicated the decrease of the melting point, Tm with increasing milling time. The melting point depression was found to be proportional to inverse grain size. The strain accumulated in the powder particles is mainly caused by intergrain dislocations.",
author = "A. R{\'e}v{\'e}sz",
year = "2005",
month = "4",
doi = "10.1007/s10853-005-0664-1",
language = "English",
volume = "40",
pages = "1643--1646",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "7",

}

TY - JOUR

T1 - Melting behavior and origin of strain in ball-milled nanocrystalline Al powders

AU - Révész, A.

PY - 2005/4

Y1 - 2005/4

N2 - Ball-milled aluminum powders have been investigated by differential scanning calorimetry and high resolution X-ray line profile analysis. Ball-milling was carried out for different milling times ranging from 45 min to 32 days. The milling time dependence of the average grain-size and of the density of lattice defects, mainly dislocations, were determined by the modified Williamson-Hall and Warren-Averbach procedures based on the dislocation model of mean square strain. Characteristic grain sizes of ball-milled Al-powders decreases with increasing milling time and simultaneously, the grain-size distribution becomes sharper. Calorimetric measurements indicated the decrease of the melting point, Tm with increasing milling time. The melting point depression was found to be proportional to inverse grain size. The strain accumulated in the powder particles is mainly caused by intergrain dislocations.

AB - Ball-milled aluminum powders have been investigated by differential scanning calorimetry and high resolution X-ray line profile analysis. Ball-milling was carried out for different milling times ranging from 45 min to 32 days. The milling time dependence of the average grain-size and of the density of lattice defects, mainly dislocations, were determined by the modified Williamson-Hall and Warren-Averbach procedures based on the dislocation model of mean square strain. Characteristic grain sizes of ball-milled Al-powders decreases with increasing milling time and simultaneously, the grain-size distribution becomes sharper. Calorimetric measurements indicated the decrease of the melting point, Tm with increasing milling time. The melting point depression was found to be proportional to inverse grain size. The strain accumulated in the powder particles is mainly caused by intergrain dislocations.

UR - http://www.scopus.com/inward/record.url?scp=27544498068&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27544498068&partnerID=8YFLogxK

U2 - 10.1007/s10853-005-0664-1

DO - 10.1007/s10853-005-0664-1

M3 - Article

AN - SCOPUS:27544498068

VL - 40

SP - 1643

EP - 1646

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 7

ER -