Investigation of Si3N4-TiN/Si3N4-Si3N 4 trilayer composites with residual surface compression

Jow-Lay Huang, Feng Chi Chou, Horng Hwa Lu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The present study involved the fabrication of three-layered composites consisting of outer layers that contained Si3N4 and an inner layer that contained TiN in a Si3N4 matrix. Surface compressive stresses were developed upon cooling due to the relatively higher thermal expansion coefficient (CTE) in the inner layer. The flexural strength of layered Si3N4 composites was substantially greater than that of monolithic Si3N4. This was attributed to the surface compressive stress. The effects of TiN composition and inner layer thickness on the mechanical properties were investigated. Layered samples containing 20 vol. % TiN had lower flexural strength than Si3N4-10% TiN/Si3N4-Si3N4 due to the formation of microcracks in the inner layer. Crack behaviors in layered samples were affected by the residual stress, interface, and free sample surface. Both theoretical and experimental results indicated that the strength and toughness of layered composites were substantially greater than those of monolithic materials. The determination of fracture toughness in three-layered materials by the surface indentation technique should be done carefully due to the influence of residual stress.

Original languageEnglish
Pages (from-to)2357-2365
Number of pages9
JournalJournal of Materials Research
Volume12
Issue number9
DOIs
Publication statusPublished - 1997 Jul 1

Fingerprint

Compaction
composite materials
Composite materials
Compressive stress
Bending strength
flexural strength
Residual stresses
residual stress
Microcracks
Indentation
Toughness
microcracks
Thermal expansion
Fracture toughness
toughness
fracture strength
indentation
thermal expansion
Cooling
Cracks

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{a057bb4dc75c4051bac7e19f07547624,
title = "Investigation of Si3N4-TiN/Si3N4-Si3N 4 trilayer composites with residual surface compression",
abstract = "The present study involved the fabrication of three-layered composites consisting of outer layers that contained Si3N4 and an inner layer that contained TiN in a Si3N4 matrix. Surface compressive stresses were developed upon cooling due to the relatively higher thermal expansion coefficient (CTE) in the inner layer. The flexural strength of layered Si3N4 composites was substantially greater than that of monolithic Si3N4. This was attributed to the surface compressive stress. The effects of TiN composition and inner layer thickness on the mechanical properties were investigated. Layered samples containing 20 vol. {\%} TiN had lower flexural strength than Si3N4-10{\%} TiN/Si3N4-Si3N4 due to the formation of microcracks in the inner layer. Crack behaviors in layered samples were affected by the residual stress, interface, and free sample surface. Both theoretical and experimental results indicated that the strength and toughness of layered composites were substantially greater than those of monolithic materials. The determination of fracture toughness in three-layered materials by the surface indentation technique should be done carefully due to the influence of residual stress.",
author = "Jow-Lay Huang and Chou, {Feng Chi} and Lu, {Horng Hwa}",
year = "1997",
month = "7",
day = "1",
doi = "10.1557/JMR.1997.0312",
language = "English",
volume = "12",
pages = "2357--2365",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Materials Research Society",
number = "9",

}

Investigation of Si3N4-TiN/Si3N4-Si3N 4 trilayer composites with residual surface compression. / Huang, Jow-Lay; Chou, Feng Chi; Lu, Horng Hwa.

In: Journal of Materials Research, Vol. 12, No. 9, 01.07.1997, p. 2357-2365.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Investigation of Si3N4-TiN/Si3N4-Si3N 4 trilayer composites with residual surface compression

AU - Huang, Jow-Lay

AU - Chou, Feng Chi

AU - Lu, Horng Hwa

PY - 1997/7/1

Y1 - 1997/7/1

N2 - The present study involved the fabrication of three-layered composites consisting of outer layers that contained Si3N4 and an inner layer that contained TiN in a Si3N4 matrix. Surface compressive stresses were developed upon cooling due to the relatively higher thermal expansion coefficient (CTE) in the inner layer. The flexural strength of layered Si3N4 composites was substantially greater than that of monolithic Si3N4. This was attributed to the surface compressive stress. The effects of TiN composition and inner layer thickness on the mechanical properties were investigated. Layered samples containing 20 vol. % TiN had lower flexural strength than Si3N4-10% TiN/Si3N4-Si3N4 due to the formation of microcracks in the inner layer. Crack behaviors in layered samples were affected by the residual stress, interface, and free sample surface. Both theoretical and experimental results indicated that the strength and toughness of layered composites were substantially greater than those of monolithic materials. The determination of fracture toughness in three-layered materials by the surface indentation technique should be done carefully due to the influence of residual stress.

AB - The present study involved the fabrication of three-layered composites consisting of outer layers that contained Si3N4 and an inner layer that contained TiN in a Si3N4 matrix. Surface compressive stresses were developed upon cooling due to the relatively higher thermal expansion coefficient (CTE) in the inner layer. The flexural strength of layered Si3N4 composites was substantially greater than that of monolithic Si3N4. This was attributed to the surface compressive stress. The effects of TiN composition and inner layer thickness on the mechanical properties were investigated. Layered samples containing 20 vol. % TiN had lower flexural strength than Si3N4-10% TiN/Si3N4-Si3N4 due to the formation of microcracks in the inner layer. Crack behaviors in layered samples were affected by the residual stress, interface, and free sample surface. Both theoretical and experimental results indicated that the strength and toughness of layered composites were substantially greater than those of monolithic materials. The determination of fracture toughness in three-layered materials by the surface indentation technique should be done carefully due to the influence of residual stress.

UR - http://www.scopus.com/inward/record.url?scp=0031233107&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031233107&partnerID=8YFLogxK

U2 - 10.1557/JMR.1997.0312

DO - 10.1557/JMR.1997.0312

M3 - Article

AN - SCOPUS:0031233107

VL - 12

SP - 2357

EP - 2365

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 9

ER -