NDLI: Microstructural stability and microhardness of ultrafine grained and nanostructured Cu-5vol.%Al2O3 composite lumps/powders produced by high energy mechanical milling

Content Provider	IEEE Xplore Digital Library
Author	Mukhtar, A. Deliang Zhang Kong, C. Munroe, P.
Copyright Year	2008
Description	Author affiliation: Dept. of Eng., Waikato Univ., Hamilton (Mukhtar, A.; Deliang Zhang)
Abstract	Ultrafine grained lumps and a nanostructured powder of $Cu-5vol%Al_{2}O_{3}$ composite were produced using two high energy mechanical milling routes respectively. The milled composite materials were heat treated at 150, 300 and 500 degC for 1 hour, respectively, to determine the microstructural stability and micohardness changes of the materials as a function of the heat treatment condition. For the $Cu-5vol.%Al_{2}O_{3}$ composite lumps produced using route 1 (12 hours milling), after heat treatment at 150 degC, the Cu grain sizes decreased from the range of 100-250 nm to the range of 50-180 nm due to recrystallisation, but its average microhardness also decreased from 224 HV to 212 HV due to reduction of dislocation density. For the 24 hours milled $Cu-5vol%Al_{2}O_{3}$ powder produced using Route 2, the Cu grain sizes increase slightly from the range of 40-180 nm to the range of 50-200 nm, and as the result of this grain coarsening and decrease of dislocation density, the average microhardness decreased from 270 HV to 257 HV respectively. Further increasing the annealing temperature to 300 degC caused the grain sizes of the 12 hours milled lumps to increase to the range of 50-350 nm, and those of the 24 hours milled powder to 60-300 nm, both resulting in a decrease in the average microhardness to 207 HV for the lumps and 248 HV for the powder. Increasing the annealing temperature from 300 to 500 degC caused a much more significant increase of the Cu grain sizes of both the lumps and the powder, and a significant decrease in the microhardness of the 24 hours milled powder particles to 216 HV. However, the microhardness of the lumps decreases very little to 196 HV, suggesting the significant reinforcement effect of the $Al_{2}O_{3}$ nanoparticles.
Starting Page	59
Ending Page	62
File Size	2102131
Page Count	4
File Format	PDF
ISBN	9781424415038
DOI	10.1109/ICONN.2008.4639245
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-02-25
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Grain size Scanning electron microscopy high energy mechanical milling Powders Annealing Milling Materials copper matrix composites nanostructure microhardness ultra fine grains Copper
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Thermal Stability, Microstructures and Mechanical Properties of Nanostructured/Ultrafine Structured Cu-5vol.%Al₂O₃ Nanocomposites Fabricated by High Energy Mechanical Milling and Powder Compact Extrusion

Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling

Characteristics of Cu–Al2O3 composites of various starting particle size obtained by high-energy milling

Deformation and microstructural evolution of ultrafine- and fine-grained OFHC Cu during dynamic tensile extrusion

Wear properties of copper and copper composites powders consolidated by high-pressure torsion

Microstructural Characterization in Al-C-Al2O3 Composites Produced by Mechanical Milling

The ultra fine grained (ufg) zn produced by ball milling.

Effect of Nano-Sized Oxides on Annealing Behaviour of Ultrafine Grained Steels (2004)

Original scientific paper characteristics of cu–al2o3 composites of various starting particle size obtained by high-energy milling (2008).

Microstructural stability and microhardness of ultrafine grained and nanostructured Cu-5vol.%Al2O3 composite lumps/powders produced by high energy mechanical milling

Similar Documents

Thermal Stability, Microstructures and Mechanical Properties of Nanostructured/Ultrafine Structured Cu-5vol.%Al₂O₃ Nanocomposites Fabricated by High Energy Mechanical Milling and Powder Compact Extrusion

Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling

Characteristics of Cu–Al2O3 composites of various starting particle size obtained by high-energy milling

Deformation and microstructural evolution of ultrafine- and fine-grained OFHC Cu during dynamic tensile extrusion

Wear properties of copper and copper composites powders consolidated by high-pressure torsion

Microstructural Characterization in Al-C-Al2O3 Composites Produced by Mechanical Milling

The ultra fine grained (ufg) zn produced by ball milling.

Effect of Nano-Sized Oxides on Annealing Behaviour of Ultrafine Grained Steels (2004)

Original scientific paper characteristics of cu–al2o3 composites of various starting particle size obtained by high-energy milling (2008).

Microstructural stability and microhardness of ultrafine grained and nanostructured Cu-5vol.%Al2O3 composite lumps/powders produced by high energy mechanical milling