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Thermal expansion

About: Thermal expansion is a research topic. Over the lifetime, 21040 publications have been published within this topic receiving 349407 citations. The topic is also known as: heat expansion.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors used anisotropic hexagonal boron nitride (hBN) particles as fillers and isotactic polypropylene (iPP) as polymer matrix.

82 citations

Journal ArticleDOI
Han Feng1, Zhaoxiang Zhong1, Yang Yi1, Wei Wei1, Feng Zhang1, Weihong Xing1, Yiqun Fan1 
TL;DR: In this paper, high-permeability SiC porous ceramics were prepared using a combination method of dry press forming and in situ reaction bonding, and the resulting materials contained doping mullite fibers as a reinforcing agent and maintained sufficient bending strength.
Abstract: The gas permeability of SiC porous ceramics (SCPCs) is typically proportional to the open porosity. However, an increase in open porosity can decrease the bending strength due to weak contact between particles. In this study, high-permeability SCPCs were prepared using a combination method of dry press forming and in situ reaction bonding. The resulting materials contained doping mullite fibers as a reinforcing agent and maintained sufficient bending strength. The open porosity, mechanical strength, microstructure, gas permeability and thermal shocking resistance were systematically investigated. The presence of the mullite fibers (4%) led to increases in open porosity and bending strength to 46.8% and 15.7 MPa after sintering at 1450 °C for 4 h. Additionally, gas permeability of 1600 m 3 /m 2 ·h·kPa was attained in ceramic wafer and a high gas permeability coefficient of 1.64 × 10 −11 m 2 was achieved, superior values than most porous ceramic materials were reported. The close thermal expansion coefficient between the mullite fibers and silicon carbide confers good thermal shock resistance. The bending strength of 14.5 MPa was maintained after 60 cold-hot cycles (0–800 °C). The new SCPCs show great promise for use as next generation hot-gas filters.

81 citations

Journal ArticleDOI
TL;DR: In this paper, a gas turbine stator blade made of ZrB2 ceramic is compared with M152 (UNS S64152) alloy, and the results showed that Zb2 has more uniform temperature distribution than M152, which corresponded to its lower thermal gradient.

81 citations

Patent
02 Jul 1993
TL;DR: In this article, the ratio of the percentage content of the silver-copper alloy to that of the tungsten increases with distances from the alumina substrate 16, and the mixture sub-layer 34b has a high coefficient of thermal expansion.
Abstract: A composite substrate 30 is constituted by an alumina substrate 16, a metallic layer 34, and a copper sheet 26 bonded to the alumina substrate 16 via the metallic layer 34. The metallic layer 34 is constituted by a tungsten sub-layer 34a having a low coefficient of thermal expansion, a tungsten/silver-copper alloy mixture sub-layer 34b, and a silver-copper alloy sub-layer 34c having a high coefficient of thermal expansion. In the mixture sub-layer 34b, the ratio of the percentage content of the silver-copper alloy to that of the tungsten increases with distances from the alumina substrate 16.

81 citations

Journal ArticleDOI
TL;DR: In this paper, the structural, elastic, electronic and thermal properties of Ni3Nb were investigated by first-principles calculations, and the results were agreed well with the available experimental data.

81 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023603
20221,249
2021683
2020742
2019759
2018767