Combined Effects of Boron Carbide, Silicon, and MWCNTs in Alumina-Carbon Refractories on Their Microstructural Evolution

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Combined Effects of Boron Carbide, Silicon, and MWCNTs in Alumina-Carbon Refractories on Their Microstructural Evolution. / Liao, Ning; Li, Yawei; Jin, Shengli et al.
in: Journal of the American Ceramic Society, Jahrgang 100.2017, Nr. 1, 2017, S. 443-450.

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

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@article{3060d2703c9943209fdec6fd1a405419,
title = "Combined Effects of Boron Carbide, Silicon, and MWCNTs in Alumina-Carbon Refractories on Their Microstructural Evolution",
abstract = "The phase and microstructure evolutions of multiwalled carbon nanotubes (MWCNTs) in B4C- and Si-containing Al2O3–C specimens under elevated temperatures were investigated by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results show that the incorporation of B4C decreases the partial pressure of SiO(g) in Al2O3–C specimens due to the oxidation of B4C prior to Si at lower temperature, which prevents the transformation of MWCNTs at 1000°C and suspends the transformation under higher temperature. B2O3 vapor resulting from oxidation of B4C powder reacts with C sources to generate nanoscaled B4C droplets, which facilitate the catalytic formation of new MWCNTs and nano onion-like carbon. In addition, B-doped MWCNTs and BN tubes with the coexistence of B2O3, MWCNTs, and N2 are obtained under evaluated temperatures.",
author = "Ning Liao and Yawei Li and Shengli Jin and Yibiao Xu and Shaobai Sang and Zhaojun Deng",
year = "2017",
doi = "10.1111/jace.14543",
language = "English",
volume = "100.2017",
pages = "443--450",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell, USA",
number = "1",

}

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TY - JOUR

T1 - Combined Effects of Boron Carbide, Silicon, and MWCNTs in Alumina-Carbon Refractories on Their Microstructural Evolution

AU - Liao, Ning

AU - Li, Yawei

AU - Jin, Shengli

AU - Xu, Yibiao

AU - Sang, Shaobai

AU - Deng, Zhaojun

PY - 2017

Y1 - 2017

N2 - The phase and microstructure evolutions of multiwalled carbon nanotubes (MWCNTs) in B4C- and Si-containing Al2O3–C specimens under elevated temperatures were investigated by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results show that the incorporation of B4C decreases the partial pressure of SiO(g) in Al2O3–C specimens due to the oxidation of B4C prior to Si at lower temperature, which prevents the transformation of MWCNTs at 1000°C and suspends the transformation under higher temperature. B2O3 vapor resulting from oxidation of B4C powder reacts with C sources to generate nanoscaled B4C droplets, which facilitate the catalytic formation of new MWCNTs and nano onion-like carbon. In addition, B-doped MWCNTs and BN tubes with the coexistence of B2O3, MWCNTs, and N2 are obtained under evaluated temperatures.

AB - The phase and microstructure evolutions of multiwalled carbon nanotubes (MWCNTs) in B4C- and Si-containing Al2O3–C specimens under elevated temperatures were investigated by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results show that the incorporation of B4C decreases the partial pressure of SiO(g) in Al2O3–C specimens due to the oxidation of B4C prior to Si at lower temperature, which prevents the transformation of MWCNTs at 1000°C and suspends the transformation under higher temperature. B2O3 vapor resulting from oxidation of B4C powder reacts with C sources to generate nanoscaled B4C droplets, which facilitate the catalytic formation of new MWCNTs and nano onion-like carbon. In addition, B-doped MWCNTs and BN tubes with the coexistence of B2O3, MWCNTs, and N2 are obtained under evaluated temperatures.

U2 - 10.1111/jace.14543

DO - 10.1111/jace.14543

M3 - Article

VL - 100.2017

SP - 443

EP - 450

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 1

ER -