Chemical methods for scanning electron microscope characterization of non-oxide ceramics and composites

Research output: Contribution to journalArticle

Abstract

The deformation of ceramic matrix composites (CMC) is controlled by several processes occurring in the matrix, in the enforcing phase, at the interfaces between different phases and at the surface of the body. The main tool to study morphology features of CMC-s is high resolution scanning electron microscopy (SEM). In this study destructive chemical methods such as chemical etching and burning of combustible phases were used to prepare samples for SEM investigations from three types of materials. I. SiC skeletons of C/C-SiC structures prepared of 2D woven fabric and chopped fiber bodies were produced by chemical elimination of the constituents: Si, reinforcing C- fibers and amorphous carbon. II. Silicon-nitride reaction bonded silicon-carbide samples with finishing surface oxide films - as produced and aged - were handled by HF etchants. Etching revealed cristobalite crystallites at the interface between ceramics and oxide film, and cracks in the glassy surface layer. III. Microstructure and pore structure of Si3N4 ceramics, carbon nanotube reinforced Si3N4 (CNT/Si3N 4), and C/Si3N4 with graphite and carbon black addition were examined by HF etching.

Original languageEnglish
Pages (from-to)382-385
Number of pages4
JournalKey Engineering Materials
Volume409
DOIs
Publication statusPublished - 2009

Fingerprint

Etching
Ceramic matrix composites
Electron microscopes
Scanning
Oxide films
Composite materials
Soot
Scanning electron microscopy
Carbon Nanotubes
Graphite
Fibers
High resolution electron microscopy
Amorphous carbon
Pore structure
Carbon black
Silicon nitride
Crystallites
Silicon carbide
Silicon Dioxide
Carbon nanotubes

Keywords

  • Chemical etching
  • Composites
  • Focused ion beam
  • Microstructure characterization
  • Non-oxide ceramics
  • Scanning electron microscope

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{45dc61997ad24705ad31bfc8fb825b2e,
title = "Chemical methods for scanning electron microscope characterization of non-oxide ceramics and composites",
abstract = "The deformation of ceramic matrix composites (CMC) is controlled by several processes occurring in the matrix, in the enforcing phase, at the interfaces between different phases and at the surface of the body. The main tool to study morphology features of CMC-s is high resolution scanning electron microscopy (SEM). In this study destructive chemical methods such as chemical etching and burning of combustible phases were used to prepare samples for SEM investigations from three types of materials. I. SiC skeletons of C/C-SiC structures prepared of 2D woven fabric and chopped fiber bodies were produced by chemical elimination of the constituents: Si, reinforcing C- fibers and amorphous carbon. II. Silicon-nitride reaction bonded silicon-carbide samples with finishing surface oxide films - as produced and aged - were handled by HF etchants. Etching revealed cristobalite crystallites at the interface between ceramics and oxide film, and cracks in the glassy surface layer. III. Microstructure and pore structure of Si3N4 ceramics, carbon nanotube reinforced Si3N4 (CNT/Si3N 4), and C/Si3N4 with graphite and carbon black addition were examined by HF etching.",
keywords = "Chemical etching, Composites, Focused ion beam, Microstructure characterization, Non-oxide ceramics, Scanning electron microscope",
author = "J. Pfeifer and Enik{\~o} Horv{\'a}th and Z. V{\'e}rtesy and P. Arat{\'o} and C. Bal{\'a}zsi",
year = "2009",
doi = "10.4028/www.scientific.net/KEM.409.382",
language = "English",
volume = "409",
pages = "382--385",
journal = "Key Engineering Materials",
issn = "1013-9826",
publisher = "Trans Tech Publications",

}

TY - JOUR

T1 - Chemical methods for scanning electron microscope characterization of non-oxide ceramics and composites

AU - Pfeifer, J.

AU - Horváth, Enikõ

AU - Vértesy, Z.

AU - Arató, P.

AU - Balázsi, C.

PY - 2009

Y1 - 2009

N2 - The deformation of ceramic matrix composites (CMC) is controlled by several processes occurring in the matrix, in the enforcing phase, at the interfaces between different phases and at the surface of the body. The main tool to study morphology features of CMC-s is high resolution scanning electron microscopy (SEM). In this study destructive chemical methods such as chemical etching and burning of combustible phases were used to prepare samples for SEM investigations from three types of materials. I. SiC skeletons of C/C-SiC structures prepared of 2D woven fabric and chopped fiber bodies were produced by chemical elimination of the constituents: Si, reinforcing C- fibers and amorphous carbon. II. Silicon-nitride reaction bonded silicon-carbide samples with finishing surface oxide films - as produced and aged - were handled by HF etchants. Etching revealed cristobalite crystallites at the interface between ceramics and oxide film, and cracks in the glassy surface layer. III. Microstructure and pore structure of Si3N4 ceramics, carbon nanotube reinforced Si3N4 (CNT/Si3N 4), and C/Si3N4 with graphite and carbon black addition were examined by HF etching.

AB - The deformation of ceramic matrix composites (CMC) is controlled by several processes occurring in the matrix, in the enforcing phase, at the interfaces between different phases and at the surface of the body. The main tool to study morphology features of CMC-s is high resolution scanning electron microscopy (SEM). In this study destructive chemical methods such as chemical etching and burning of combustible phases were used to prepare samples for SEM investigations from three types of materials. I. SiC skeletons of C/C-SiC structures prepared of 2D woven fabric and chopped fiber bodies were produced by chemical elimination of the constituents: Si, reinforcing C- fibers and amorphous carbon. II. Silicon-nitride reaction bonded silicon-carbide samples with finishing surface oxide films - as produced and aged - were handled by HF etchants. Etching revealed cristobalite crystallites at the interface between ceramics and oxide film, and cracks in the glassy surface layer. III. Microstructure and pore structure of Si3N4 ceramics, carbon nanotube reinforced Si3N4 (CNT/Si3N 4), and C/Si3N4 with graphite and carbon black addition were examined by HF etching.

KW - Chemical etching

KW - Composites

KW - Focused ion beam

KW - Microstructure characterization

KW - Non-oxide ceramics

KW - Scanning electron microscope

UR - http://www.scopus.com/inward/record.url?scp=68549135437&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68549135437&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/KEM.409.382

DO - 10.4028/www.scientific.net/KEM.409.382

M3 - Article

AN - SCOPUS:68549135437

VL - 409

SP - 382

EP - 385

JO - Key Engineering Materials

JF - Key Engineering Materials

SN - 1013-9826

ER -