Reduction of the Sintering Temperature for the Manufacturing of Carbon‐Rich Dense SiOC Bulk Ceramics
Reduction of the Sintering Temperature for the Manufacturing of Carbon‐Rich Dense SiOC Bulk Ceramics
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降低富碳致密SiOC块体陶瓷制造的烧结温度
DOI:
10.1002/adem.201800369
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发表时间:
2018
影响因子:
3.6
通讯作者:
M. Scheffler
中科院分区:
文献类型:
--
作者:
N. Mantzel;F. Schröckert;E.C. Bucharsky;K.G. Schell;M.J. Hoffmann;M. Scheffler
A major challenge in the processing of compact polymer derived ceramics is the removal of pores. Even after field‐assisted sintering (FAST) under pressure, a certain level of porosity remains within samples and parts. In order to reduce the porosity, a novel route is developed making use of the addition of trimethyl borate to a polysilsesquioxane‐type preceramic polymer system; trimethyl borate is a molecular boron oxide precursor. It is found that boron‐oxide free samples show a high compression rate during field‐assisted sintering between 1400 and 1600 °C, boron oxide and boron oxide/alumina containing samples show this effect already between 1350 and 1500 °C. In a tentative reaction mechanism, this effect is assigned to the formation of a borosilicate glass by chemical reactions of boron oxide with the silica component of the polysiloxane‐derived ceramic; this glassy phase assists the densification process by viscous flow. The porosity in boron oxide‐containing samples is found to be between 0.3% and 1.4% while boron oxide‐free samples show a total porosity of ≈38% after processing under identical conditions.
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影响因子:
4.5
作者:
Verena Reschke;M. Scheffler
通讯作者:
Verena Reschke;M. Scheffler
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
K. G. Schell;E. Bucharsky;R. Oberacker;Michael J. Hoffmann
通讯作者:
Michael J. Hoffmann
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Woiton;Madeleine Heyder;Alexandra Laskowsky;E. Stern;M. Scheffler;C. Brabec
通讯作者:
C. Brabec
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
J. Mayer;D. Szabó;M. Rühle;M. Seher;R. Riedel
通讯作者:
R. Riedel
影响因子:
3.9
作者:
Colombo, Paolo;Mera, Gabriela;Soraru, Gian Domenico
通讯作者:
Soraru, Gian Domenico