The Cu-W bulk nanocomposites of different compositions were successfully synthesized by high-energy ball milling of elemental powders. The nanocrystalline nature of the Cu-W composite powder is confirmed by X-ray diffraction analysis, transmission electron microscopy, and atomic force microscopy. The Cu-W nanocomposite powder could be sintered at 300-400 °C below the sintering temperature of the un-milled Cu-W powders. The Cu-W nanocomposites showed superior densification and hardness than that of un-milled Cu-W composites. The nanocomposites also have three times higher hardness to resistivity ratio in comparison to Oxygen free high conductivity copper. Copyright © 2007 American Scientific Publishers All rights reserved.

Budaraju Srinivasa Murty

Department of Metallurgical and Materials Engineering

T. Venugopal

ATOMIC FORCE (AF)

Composite powders

Elemental powders

HIGH ENERGY BALL MILLING (HEBM)

Nano composites

NANOCOMPOSITE POWDERS

NANOCRYSTALLINE NATURE

OXYGEN FREE HIGH CONDUCTIVITY COPPER (OFHC)

RESISTIVITY RATIO

Sintering temperatures

SYNTHESIS (OF CHIRAL IONIC LIQUIDS)

X RAY DIFFRACTION (XRD)

Atomic force microscopy

Ball milling

Carbon fiber reinforced plastics

Complexation

Copper

Copper alloys

Crystals

DISTANCE MEASUREMENT

Grinding (machining)

Hardness

High energy physics

Lithium batteries

Microscopic examination

Milling (machining)

MILLING MACHINES

Nanocomposites

Oxygen

Powders

Scanning probe microscopy

Sintering

Steel analysis

Transmission electron microscopy

X ray diffraction analysis

X ray powder diffraction

Nanostructured materials

alloy

nanomaterial

Tungsten

article

chemistry

conformation

Crystallization

Energy transfer

macromolecule

materials testing

Metallurgy

methodology

Nanotechnology

particle size

powder

surface property

ultrastructure

Alloys

Macromolecular Substances

Molecular Conformation

Nanostructures

Surface Properties

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Journal of Nanoscience and Nanotechnology

The nanocrystalline lead zirconate titanate (PZT) with the composition Pb(Zr0.53Ti0.47)O3 has been synthesized by mechanical activation, without calcination at intermediate temperature. The PZT powder that has been mechanically activated for 10, 20 and 30 h shows crystallite size of 15, 12 and 8 nm, respectively. Size effect on PZT formation, tetragonality factor and dielectric constant has been investigated in detail. TEM and AFM studies have been carried out to confirm the formation of nanocrystalline PZT. The temperature dependence of dielectric constant at different frequencies was also measured, to study the size effects in PZT ferroelectrics. The nanocrystalline PZT obtained by this route has high dielectric constant at Curie temperature in comparison to that prepared conventionally. © 2009 Elsevier B.V. All rights reserved.

Materials Chemistry and Physics

Size effect studies on nanocrystalline Pb(Zr0.53Ti0.47)O3 synthesized by mechanical activation route

Cu-Al2O3 nanocomposite is successfully synthesized by reactive milling of CuO/Cu2O and Al. Wet milling in toluene transforms the combustion reaction to a progressive reaction. The extent of reduction reaction increases with increase in excess reductant (Al). The crystallite size of Cu obtained from reactive milling is much finer than that obtained from ball milling of Cu and Al2O3. © 2004 Elsevier B.V. All rights reserved.

Materials Science and Engineering A

Synthesis of copper-alumina nanocomposite by reactive milling

Progress in Materials Science

Synthesis and mechanical behavior of nanostructured materials via cryomilling

Advanced Engineering Materials

Recent Developments in Nanostructured Materials

Acta Materialia

Tensile properties of in situ consolidated nanocrystalline Cu

Powder Technology

The influence of the dispersion technique on the characteristics of the W–Cu powders and on the sintering behavior

Synthesis of Cu-W nanocomposite by high-energy ball milling

Journal	Journal of Nanoscience and Nanotechnology
ISSN	15334880
Open Access	No