Thermal Expansion Adjustable Metal Matrix Composites Containing Manganese Nitrides with Negative Thermal Expansion
نویسندگان
چکیده
منابع مشابه
Synthesis of Zr2WP2O12/ZrO2 Composites with Adjustable Thermal Expansion
Zr2WP2O12/ZrO2 composites were fabricated by solid state reaction with the goal of tailoring the thermal expansion coefficient. XRD, SEM and TMA were used to investigate the composition, microstructure, and thermal expansion behavior of Zr2WP2O12/ZrO2 composites with different mass ratio. Relative densities of all the resulting Zr2WP2O12/ZrO2 samples were also tested by Archimedes' methods. The...
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It is general knowledge that materials expand with increasing temperature and contract with decreasing temperature. Only few materials seem to neither expand nor contract over a certain temperature range and thus feature near zero thermal expansion (ZTE) behavior. These materials are the focus of recent scientifi c work [ 1–5 ] and have potential technical applications in both structural materi...
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Introduction Many materials which we encounter in everyday life expand on heating. This fact of life is easily highlighted with a simple experiment that we are all familiar with and involves a metallic sphere passing through a metal ring. At room temperature, the sphere is of such a size that it can easily pass through the ring, but after the sphere is heated, it will have expanded with the res...
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Solid solutions with the composition Ba0.5Sr0.5Zn₂Si2-xGexO₇ and BaZn₂Si2-xGexO₇ were prepared with different values of x using a conventional mixed oxide route. Both compounds exhibit very different thermal expansion, which is due to the different crystal structures. Ba0.5Sr0.5Zn₂Si2-xGexO₇ solid solutions exhibit the structure of high-temperature BaZn₂Si₂O₇ and show negative thermal expansion...
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The thermal-expansion properties of substances are very important in materials design; for example, cracks form when joined materials expand or contract by different amounts upon heating. The most famous example of a substance that contracts when heated is ice: it transforms into water, which has a higher density than ice. Negative thermal expansion (NTE) in solids is relatively rare, although ...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals
سال: 2013
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet.77.75