Effect of demixing and coarsening on the energetics of poly(boro)silazane- derived amorphous Si-(B-)C-N ceramics

Yan Gao; Scarlett J. Widgeon; Tien B. Tran; Amir Hossein Tavakoli; Gabriela Mera; Sabyasachi Sen; Ralf Riedel; Alexandra Navrotsky

doi:10.1016/j.scriptamat.2013.04.022

Effect of demixing and coarsening on the energetics of poly(boro)silazane- derived amorphous Si-(B-)C-N ceramics

Yan Gao, Scarlett J. Widgeon, Tien B. Tran, Amir Hossein Tavakoli, Gabriela Mera, Sabyasachi Sen, Ralf Riedel, Alexandra Navrotsky

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

21 Scopus citations

Abstract

Novel poly(boro)silazane-derived Si-(B-)C-N ceramics pyrolyzed at 1100 and 1400 C were analyzed by multinuclear magic-angle spinning nuclear magnetic resonance spectroscopy and high-temperature oxidative solution calorimetry to investigate the energetic effects of nanodomain structure evolution at two critical pyrolysis temperatures. Like other Si-B-C-N ceramics, increasing pyrolysis temperatures result in the demixing of SiC_xN _4-x mixed bond environments into SiC₄ and SiN₄ tetrahedra, interdomain bond cleavage and nanodomain coarsening. Concurrent demixing and domain coarsening, processes detrimental to these ceramics, were found to be energetically stabilizing.

Original language	English (US)
Pages (from-to)	347-350
Number of pages	4
Journal	Scripta Materialia
Volume	69
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2013.04.022
State	Published - Sep 2013
Externally published	Yes

Keywords

Amorphous materials
Nanostructure
Nuclear magnetic resonance (NMR)
Polymer-derived ceramics
Thermodynamics

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2013.04.022

Cite this

@article{3c42d85e8352488f9f1b5a245d300c38,

title = "Effect of demixing and coarsening on the energetics of poly(boro)silazane- derived amorphous Si-(B-)C-N ceramics",

abstract = "Novel poly(boro)silazane-derived Si-(B-)C-N ceramics pyrolyzed at 1100 and 1400 C were analyzed by multinuclear magic-angle spinning nuclear magnetic resonance spectroscopy and high-temperature oxidative solution calorimetry to investigate the energetic effects of nanodomain structure evolution at two critical pyrolysis temperatures. Like other Si-B-C-N ceramics, increasing pyrolysis temperatures result in the demixing of SiCxN 4-x mixed bond environments into SiC4 and SiN4 tetrahedra, interdomain bond cleavage and nanodomain coarsening. Concurrent demixing and domain coarsening, processes detrimental to these ceramics, were found to be energetically stabilizing.",

keywords = "Amorphous materials, Nanostructure, Nuclear magnetic resonance (NMR), Polymer-derived ceramics, Thermodynamics",

author = "Yan Gao and Widgeon, {Scarlett J.} and Tran, {Tien B.} and Tavakoli, {Amir Hossein} and Gabriela Mera and Sabyasachi Sen and Ralf Riedel and Alexandra Navrotsky",

note = "Funding Information: This study was supported by the National Science Foundation-Deutsche Forschungsgemeinschaft (NSF-DFG) Materials World Network (MWN-0907792) under the collaborative project, “Nanostructure and thermodynamics of polymer-derived ceramics”.",

year = "2013",

month = sep,

doi = "10.1016/j.scriptamat.2013.04.022",

language = "English (US)",

volume = "69",

pages = "347--350",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

number = "5",

}

TY - JOUR

T1 - Effect of demixing and coarsening on the energetics of poly(boro)silazane- derived amorphous Si-(B-)C-N ceramics

AU - Gao, Yan

AU - Widgeon, Scarlett J.

AU - Tran, Tien B.

AU - Tavakoli, Amir Hossein

AU - Mera, Gabriela

AU - Sen, Sabyasachi

AU - Riedel, Ralf

AU - Navrotsky, Alexandra

N1 - Funding Information: This study was supported by the National Science Foundation-Deutsche Forschungsgemeinschaft (NSF-DFG) Materials World Network (MWN-0907792) under the collaborative project, “Nanostructure and thermodynamics of polymer-derived ceramics”.

PY - 2013/9

Y1 - 2013/9

N2 - Novel poly(boro)silazane-derived Si-(B-)C-N ceramics pyrolyzed at 1100 and 1400 C were analyzed by multinuclear magic-angle spinning nuclear magnetic resonance spectroscopy and high-temperature oxidative solution calorimetry to investigate the energetic effects of nanodomain structure evolution at two critical pyrolysis temperatures. Like other Si-B-C-N ceramics, increasing pyrolysis temperatures result in the demixing of SiCxN 4-x mixed bond environments into SiC4 and SiN4 tetrahedra, interdomain bond cleavage and nanodomain coarsening. Concurrent demixing and domain coarsening, processes detrimental to these ceramics, were found to be energetically stabilizing.

AB - Novel poly(boro)silazane-derived Si-(B-)C-N ceramics pyrolyzed at 1100 and 1400 C were analyzed by multinuclear magic-angle spinning nuclear magnetic resonance spectroscopy and high-temperature oxidative solution calorimetry to investigate the energetic effects of nanodomain structure evolution at two critical pyrolysis temperatures. Like other Si-B-C-N ceramics, increasing pyrolysis temperatures result in the demixing of SiCxN 4-x mixed bond environments into SiC4 and SiN4 tetrahedra, interdomain bond cleavage and nanodomain coarsening. Concurrent demixing and domain coarsening, processes detrimental to these ceramics, were found to be energetically stabilizing.

KW - Amorphous materials

KW - Nanostructure

KW - Nuclear magnetic resonance (NMR)

KW - Polymer-derived ceramics

KW - Thermodynamics

UR - http://www.scopus.com/inward/record.url?scp=84879889903&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879889903&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2013.04.022

DO - 10.1016/j.scriptamat.2013.04.022

M3 - Article

AN - SCOPUS:84879889903

SN - 1359-6462

VL - 69

SP - 347

EP - 350

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Effect of demixing and coarsening on the energetics of poly(boro)silazane- derived amorphous Si-(B-)C-N ceramics

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this