Thermal expansion of aluminum-fly ash cenosphere composites synthesized by pressure infiltration echnique

P. K. Rohatgi, Nikhil Gupta, Simon Alaraj

Research output: Contribution to journalArticle

Abstract

The coefficients of thermal expansion (CTEs) of commercially available pure aluminum and aluminum alloy composites containing hollow fly ash particles (cenospheres) of average size 125 mm are measured using a dilatometer. Three types of composites are made using the pressure infiltration technique at applied pressures and infiltration times of 35 kPa for 3 min, 35 kPa for 7 min, and 62 kPa for 7 min. The volume fractions of the fly ash cenospheres in the composites are around 65%. The CTE of the composites is measured to be in the range of 13.1×10-6-11×10-6/°C, which is lower than that of pure aluminum (25.3×10-6/°C). The infiltration processing conditions are found to influence the CTE of the composites. A higher applied pressure and a longer infiltration time lead to a lower CTE. The theoretical value of the CTE of fly ash cenospheres is estimated to be 6.1×10-6/°C.

Original languageEnglish (US)
Pages (from-to)1163-1174
Number of pages12
JournalJournal of Composite Materials
Volume40
Issue number13
DOIs
StatePublished - Jul 2006

Fingerprint

Coal Ash
Aluminum
Fly ash
Infiltration
Thermal expansion
Composite materials
Dilatometers
Aluminum alloys
Volume fraction
Processing

Keywords

  • Aluminum
  • Coefficient of thermal expansion
  • Metal matrix composites
  • Solidification

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Thermal expansion of aluminum-fly ash cenosphere composites synthesized by pressure infiltration echnique. / Rohatgi, P. K.; Gupta, Nikhil; Alaraj, Simon.

In: Journal of Composite Materials, Vol. 40, No. 13, 07.2006, p. 1163-1174.

Research output: Contribution to journalArticle

@article{370576f603d84d5496cb7c1eee1111a7,
title = "Thermal expansion of aluminum-fly ash cenosphere composites synthesized by pressure infiltration echnique",
abstract = "The coefficients of thermal expansion (CTEs) of commercially available pure aluminum and aluminum alloy composites containing hollow fly ash particles (cenospheres) of average size 125 mm are measured using a dilatometer. Three types of composites are made using the pressure infiltration technique at applied pressures and infiltration times of 35 kPa for 3 min, 35 kPa for 7 min, and 62 kPa for 7 min. The volume fractions of the fly ash cenospheres in the composites are around 65{\%}. The CTE of the composites is measured to be in the range of 13.1×10-6-11×10-6/°C, which is lower than that of pure aluminum (25.3×10-6/°C). The infiltration processing conditions are found to influence the CTE of the composites. A higher applied pressure and a longer infiltration time lead to a lower CTE. The theoretical value of the CTE of fly ash cenospheres is estimated to be 6.1×10-6/°C.",
keywords = "Aluminum, Coefficient of thermal expansion, Metal matrix composites, Solidification",
author = "Rohatgi, {P. K.} and Nikhil Gupta and Simon Alaraj",
year = "2006",
month = "7",
doi = "10.1177/0021998305057379",
language = "English (US)",
volume = "40",
pages = "1163--1174",
journal = "Journal of Composite Materials",
issn = "0021-9983",
publisher = "SAGE Publications Ltd",
number = "13",

}

TY - JOUR

T1 - Thermal expansion of aluminum-fly ash cenosphere composites synthesized by pressure infiltration echnique

AU - Rohatgi, P. K.

AU - Gupta, Nikhil

AU - Alaraj, Simon

PY - 2006/7

Y1 - 2006/7

N2 - The coefficients of thermal expansion (CTEs) of commercially available pure aluminum and aluminum alloy composites containing hollow fly ash particles (cenospheres) of average size 125 mm are measured using a dilatometer. Three types of composites are made using the pressure infiltration technique at applied pressures and infiltration times of 35 kPa for 3 min, 35 kPa for 7 min, and 62 kPa for 7 min. The volume fractions of the fly ash cenospheres in the composites are around 65%. The CTE of the composites is measured to be in the range of 13.1×10-6-11×10-6/°C, which is lower than that of pure aluminum (25.3×10-6/°C). The infiltration processing conditions are found to influence the CTE of the composites. A higher applied pressure and a longer infiltration time lead to a lower CTE. The theoretical value of the CTE of fly ash cenospheres is estimated to be 6.1×10-6/°C.

AB - The coefficients of thermal expansion (CTEs) of commercially available pure aluminum and aluminum alloy composites containing hollow fly ash particles (cenospheres) of average size 125 mm are measured using a dilatometer. Three types of composites are made using the pressure infiltration technique at applied pressures and infiltration times of 35 kPa for 3 min, 35 kPa for 7 min, and 62 kPa for 7 min. The volume fractions of the fly ash cenospheres in the composites are around 65%. The CTE of the composites is measured to be in the range of 13.1×10-6-11×10-6/°C, which is lower than that of pure aluminum (25.3×10-6/°C). The infiltration processing conditions are found to influence the CTE of the composites. A higher applied pressure and a longer infiltration time lead to a lower CTE. The theoretical value of the CTE of fly ash cenospheres is estimated to be 6.1×10-6/°C.

KW - Aluminum

KW - Coefficient of thermal expansion

KW - Metal matrix composites

KW - Solidification

UR - http://www.scopus.com/inward/record.url?scp=33745312510&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745312510&partnerID=8YFLogxK

U2 - 10.1177/0021998305057379

DO - 10.1177/0021998305057379

M3 - Article

VL - 40

SP - 1163

EP - 1174

JO - Journal of Composite Materials

JF - Journal of Composite Materials

SN - 0021-9983

IS - 13

ER -