Elastic and Optical Anisotropy of the Single-Coal Monolithic High-Temperature (HT) Carbonization Products Obtained on a Laboratory Scale

2005 ◽  
Vol 19 (5) ◽  
pp. 1962-1970 ◽  
Author(s):  
Marta Krzesińska ◽  
Sławomira Pusz ◽  
Andrzej Koszorek
Author(s):  
Hisashi Nakamura ◽  
Yuji Kuwayama ◽  
Takakazu Onishi ◽  
Takuya Tezuka ◽  
Susumu Hasegawa ◽  
...  

2019 ◽  
Vol 809 ◽  
pp. 140-147 ◽  
Author(s):  
Maike Böttcher ◽  
Daisy Nestler ◽  
Jonas Stiller ◽  
Lothar Kroll

Ceramic materials are suitable for use in the high temperature range. Oxide ceramics, in particular, have a high potential for long-term applications under thermal cycling and oxidising atmosphere. However, monolithic oxide ceramics are unsuitable for use in high-temperature technical applications because of their brittleness. Thin-walled, oxidation resistant, and high-temperature resistant materials can be developed by reinforcing oxide ceramics with ceramic fibres such as alumina fibres. The increase of the mechanical stability of the composites in comparison to the non-fibre reinforced material is of outstanding importance. Possible stresses or cracks can be derived along the fibre under mechanical stress or deformation. Components made of fibre-reinforced ceramic composites with oxide ceramic matrix (OCMC) are currently produced in manual and price-intensive processes for small series. Therefore, the manufacturing should be improved. The ceramic injection moulding (CIM) process is established in the production of monolithic oxide ceramics. This process is characterised by its excellent automation capability. In order to realise large scale production, the CIM-process should be transferred to the production of fibre-reinforced oxide ceramics. The CIM-process enables the production of complicated component shapes and contours without the need for complex mechanical post-treatment. This means that components with complex geometries can be manufactured in large quantities.To investigate the suitability of the injection moulding process for the production of OCMCs, two different feedstocks and alumina fibres (Nextel 610) were compounded in a laboratory-scale compounder. The fibre volume fractions were varied. In a laboratory-scale injection moulding device, microbending specimens were produced from the compounds obtained in this way. To characterise the test specimens, microstructure examinations and mechanical-static tests were done. It is shown that the injection moulding process is suitable for the production of fibre-reinforced oxide ceramics. The investigations show that the feedstocks used have potential for further research work and for future applications as material components for high-temperature applications in oxidising atmospheres.


2009 ◽  
Vol 166 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Carl M. Stoots ◽  
James E. O’Brien ◽  
Keith Condie ◽  
Lisa Moore-McAteer ◽  
Gregory Housley ◽  
...  

1991 ◽  
Vol 244 ◽  
Author(s):  
Kazutaka Baba ◽  
Jun-Ichiro Katsu ◽  
Mitsunobu Miyagi

ABSTRACTUltra-thin gold island films with optical anisotropy have been fabricated by stretching ordinary isotropic island films in the high temperature. The origin of optical anisotropy seems to come from an elongated prolate island shape.


2007 ◽  
Vol 17 (2) ◽  
pp. 2091-2094 ◽  
Author(s):  
Jiasu Wang ◽  
Suyu Wang ◽  
Changyan Deng ◽  
Jun Zheng ◽  
Honghai Song ◽  
...  

1996 ◽  
Vol 20 (4) ◽  
pp. 483-487 ◽  
Author(s):  
W. Weissflog ◽  
A. Saupe ◽  
I. Letko ◽  
S. Diele ◽  
G. Pelzl

2021 ◽  
Vol 44 (6) ◽  
pp. 20200020
Author(s):  
Sascha Frank ◽  
Philipp Zuber ◽  
Stefan Pollak ◽  
Thomas Heinze ◽  
Jürgen Schreuer ◽  
...  

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