Microwave sintering of refractory metals/alloys

W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe alloys

Avijit Mondal, Dinesh Kumar Agrawal, Anish Upadhyaya

Research output: Contribution to journalReview article

55 Citations (Scopus)

Abstract

Refractory metals and alloys are well known for their high mechanical properties which make them useful for wide range of high temperature applications. However, owing to the refractoriness of these metals and alloys, it is very difficult to consolidate them under moderate conditions. Conventional P/M processing is a viable sintering technique for these refractory metals. One of the constraints in conventional sintering is long residence time which results in undesirable microstructural coarsening. This problem gets further aggravated when using smaller (submicron and nano) precursor powder sizes. Furthermore, conventional heating is mostly radiative, which leads to non-uniform heating in large components. This review article describes recent research findings about how these refractory metals and alloys (W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe) have been successfully consolidated using microwave sintering. A comparative study with conventional data has been made. In most cases, microwave sintering resulted in an overall reduction of sintering time of up to 80%. This sintering time reduction prevents grain growth substantially providing finer microstructure and as a result better mechanical properties have been observed.

Original languageEnglish (US)
Pages (from-to)28-44
Number of pages17
JournalJournal of Microwave Power and Electromagnetic Energy
Volume44
Issue number1
DOIs
StatePublished - Jan 1 2010

Fingerprint

refractory metal alloys
Refractory metals
sintering
Sintering
Microwaves
microwaves
refractory metals
Refractory alloys
mechanical properties
Heating
Mechanical properties
heating
High temperature applications
Coarsening
Grain growth
Powders
Metals
microstructure
Microstructure

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

Mondal, Avijit ; Agrawal, Dinesh Kumar ; Upadhyaya, Anish. / Microwave sintering of refractory metals/alloys : W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe alloys. In: Journal of Microwave Power and Electromagnetic Energy. 2010 ; Vol. 44, No. 1. pp. 28-44.
@article{b8ff4997f90b4004bbb317c990d60b02,
title = "Microwave sintering of refractory metals/alloys: W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe alloys",
abstract = "Refractory metals and alloys are well known for their high mechanical properties which make them useful for wide range of high temperature applications. However, owing to the refractoriness of these metals and alloys, it is very difficult to consolidate them under moderate conditions. Conventional P/M processing is a viable sintering technique for these refractory metals. One of the constraints in conventional sintering is long residence time which results in undesirable microstructural coarsening. This problem gets further aggravated when using smaller (submicron and nano) precursor powder sizes. Furthermore, conventional heating is mostly radiative, which leads to non-uniform heating in large components. This review article describes recent research findings about how these refractory metals and alloys (W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe) have been successfully consolidated using microwave sintering. A comparative study with conventional data has been made. In most cases, microwave sintering resulted in an overall reduction of sintering time of up to 80{\%}. This sintering time reduction prevents grain growth substantially providing finer microstructure and as a result better mechanical properties have been observed.",
author = "Avijit Mondal and Agrawal, {Dinesh Kumar} and Anish Upadhyaya",
year = "2010",
month = "1",
day = "1",
doi = "10.1080/08327823.2010.11689768",
language = "English (US)",
volume = "44",
pages = "28--44",
journal = "Journal of Microwave Power and Electromagnetic Energy",
issn = "0832-7823",
publisher = "International Microwave Power Institute",
number = "1",

}

Microwave sintering of refractory metals/alloys : W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe alloys. / Mondal, Avijit; Agrawal, Dinesh Kumar; Upadhyaya, Anish.

In: Journal of Microwave Power and Electromagnetic Energy, Vol. 44, No. 1, 01.01.2010, p. 28-44.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Microwave sintering of refractory metals/alloys

T2 - W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe alloys

AU - Mondal, Avijit

AU - Agrawal, Dinesh Kumar

AU - Upadhyaya, Anish

PY - 2010/1/1

Y1 - 2010/1/1

N2 - Refractory metals and alloys are well known for their high mechanical properties which make them useful for wide range of high temperature applications. However, owing to the refractoriness of these metals and alloys, it is very difficult to consolidate them under moderate conditions. Conventional P/M processing is a viable sintering technique for these refractory metals. One of the constraints in conventional sintering is long residence time which results in undesirable microstructural coarsening. This problem gets further aggravated when using smaller (submicron and nano) precursor powder sizes. Furthermore, conventional heating is mostly radiative, which leads to non-uniform heating in large components. This review article describes recent research findings about how these refractory metals and alloys (W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe) have been successfully consolidated using microwave sintering. A comparative study with conventional data has been made. In most cases, microwave sintering resulted in an overall reduction of sintering time of up to 80%. This sintering time reduction prevents grain growth substantially providing finer microstructure and as a result better mechanical properties have been observed.

AB - Refractory metals and alloys are well known for their high mechanical properties which make them useful for wide range of high temperature applications. However, owing to the refractoriness of these metals and alloys, it is very difficult to consolidate them under moderate conditions. Conventional P/M processing is a viable sintering technique for these refractory metals. One of the constraints in conventional sintering is long residence time which results in undesirable microstructural coarsening. This problem gets further aggravated when using smaller (submicron and nano) precursor powder sizes. Furthermore, conventional heating is mostly radiative, which leads to non-uniform heating in large components. This review article describes recent research findings about how these refractory metals and alloys (W, Mo, Re, W-Cu, W-Ni-Cu and W-Ni-Fe) have been successfully consolidated using microwave sintering. A comparative study with conventional data has been made. In most cases, microwave sintering resulted in an overall reduction of sintering time of up to 80%. This sintering time reduction prevents grain growth substantially providing finer microstructure and as a result better mechanical properties have been observed.

UR - http://www.scopus.com/inward/record.url?scp=84859366166&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859366166&partnerID=8YFLogxK

U2 - 10.1080/08327823.2010.11689768

DO - 10.1080/08327823.2010.11689768

M3 - Review article

VL - 44

SP - 28

EP - 44

JO - Journal of Microwave Power and Electromagnetic Energy

JF - Journal of Microwave Power and Electromagnetic Energy

SN - 0832-7823

IS - 1

ER -