Thermal properties of pressureless melt infiltrated AlN-Si-Al composites

Ayse Kalemtas; Gulsum Topates; Ozlem Bahadir; Pinar Kaya Isci; Hasan Mandal

doi:10.1016/S1003-6326(13)62598-4

Thermal properties of pressureless melt infiltrated AlN-Si-Al composites

Ayse Kalemtas^*, Gulsum Topates, Ozlem Bahadir, Pinar Kaya Isci, Hasan Mandal

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Thermal properties of AlN-Si-Al composites produced by pressureless melt infiltration of Al/Al alloys into porous α-Si₃N₄ preforms were investigated in a temperature range of 50-300 C. SEM and TEM investigations revealed that the grain size of AlN particles was less than 1 μm. In spite of sub-micron grain size, composites showed relatively high thermal conductivity (TC), 55-107 W/(m.K). The thermal expansion coefficient (CTE) of the composite produced with commercial Al source, which has the highest TC of 107 W/(m.K), was 6.5×10^-6 K^-1. Despite the high CTE of Al (23.6×10^-6 K^-1), composites revealed significantly low CTE through the formation of Si and AlN phases during the infiltration process.

Original language	English
Pages (from-to)	1304-1313
Number of pages	10
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	23
Issue number	5
DOIs	https://doi.org/10.1016/S1003-6326(13)62598-4
Publication status	Published - May 2013
Externally published	Yes

Keywords

AlN
ceramic-matrix composites
liquid metal infiltration
thermal properties

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10.1016/S1003-6326(13)62598-4

Cite this

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title = "Thermal properties of pressureless melt infiltrated AlN-Si-Al composites",

abstract = "Thermal properties of AlN-Si-Al composites produced by pressureless melt infiltration of Al/Al alloys into porous α-Si3N4 preforms were investigated in a temperature range of 50-300 C. SEM and TEM investigations revealed that the grain size of AlN particles was less than 1 μm. In spite of sub-micron grain size, composites showed relatively high thermal conductivity (TC), 55-107 W/(m.K). The thermal expansion coefficient (CTE) of the composite produced with commercial Al source, which has the highest TC of 107 W/(m.K), was 6.5×10-6 K-1. Despite the high CTE of Al (23.6×10-6 K-1), composites revealed significantly low CTE through the formation of Si and AlN phases during the infiltration process.",

keywords = "AlN, ceramic-matrix composites, liquid metal infiltration, thermal properties",

author = "Ayse Kalemtas and Gulsum Topates and Ozlem Bahadir and \{Kaya Isci\}, Pinar and Hasan Mandal",

year = "2013",

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doi = "10.1016/S1003-6326(13)62598-4",

language = "English",

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pages = "1304--1313",

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number = "5",

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TY - JOUR

T1 - Thermal properties of pressureless melt infiltrated AlN-Si-Al composites

AU - Kalemtas, Ayse

AU - Topates, Gulsum

AU - Bahadir, Ozlem

AU - Kaya Isci, Pinar

AU - Mandal, Hasan

PY - 2013/5

Y1 - 2013/5

N2 - Thermal properties of AlN-Si-Al composites produced by pressureless melt infiltration of Al/Al alloys into porous α-Si3N4 preforms were investigated in a temperature range of 50-300 C. SEM and TEM investigations revealed that the grain size of AlN particles was less than 1 μm. In spite of sub-micron grain size, composites showed relatively high thermal conductivity (TC), 55-107 W/(m.K). The thermal expansion coefficient (CTE) of the composite produced with commercial Al source, which has the highest TC of 107 W/(m.K), was 6.5×10-6 K-1. Despite the high CTE of Al (23.6×10-6 K-1), composites revealed significantly low CTE through the formation of Si and AlN phases during the infiltration process.

AB - Thermal properties of AlN-Si-Al composites produced by pressureless melt infiltration of Al/Al alloys into porous α-Si3N4 preforms were investigated in a temperature range of 50-300 C. SEM and TEM investigations revealed that the grain size of AlN particles was less than 1 μm. In spite of sub-micron grain size, composites showed relatively high thermal conductivity (TC), 55-107 W/(m.K). The thermal expansion coefficient (CTE) of the composite produced with commercial Al source, which has the highest TC of 107 W/(m.K), was 6.5×10-6 K-1. Despite the high CTE of Al (23.6×10-6 K-1), composites revealed significantly low CTE through the formation of Si and AlN phases during the infiltration process.

KW - AlN

KW - ceramic-matrix composites

KW - liquid metal infiltration

KW - thermal properties

UR - https://www.scopus.com/pages/publications/84879079519

U2 - 10.1016/S1003-6326(13)62598-4

DO - 10.1016/S1003-6326(13)62598-4

M3 - Article

AN - SCOPUS:84879079519

SN - 1003-6326

VL - 23

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EP - 1313

JO - Transactions of Nonferrous Metals Society of China (English Edition)

JF - Transactions of Nonferrous Metals Society of China (English Edition)

IS - 5

ER -

Thermal properties of pressureless melt infiltrated AlN-Si-Al composites

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Keywords

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