Zr-Cu-Al metallic glasses were formulated with differing compositions to determine their thermophysical properties. It was determined that by decreasing the zirconium content of the metallic glass, the thermal conductivity can be increased. The maximum value of thermal conductivity was found for the metallic glass with a composition of Zr:Cu:Al = 50:39.3:10.7 (at. %). It was found that although the metallic glasses did not crystallize with heat treatment below Tg, they did ...
Author(s): Hideaki Nagai, Mikito Mamiya, Takeshi Okutani
This study measures the thermal conductivity, thermal diffusivity, and specific heat of selenium-tellurium-tin alloys at room temperature. Selenium-tin alloys have high photosensitivity, higher crystallization temperature and smaller aging effects then just selenium. However, without an extra element to act as a chemical modifier limited reversibility and low glass transmission are issues. The researchers hope that the addition of tin will produce an improved alloy. Investigations showed that there were structural ...
Author(s): A. Sharma, N. Mehta
The purpose of this study was to provide a comprehensive overview of compressive creep of mullite refractories, which are a potential replacement for more traditional silica refractories in harsh oxy-fuel environments. Tests performed included corrosion resistance, microstructure analysis, dimensional stability, phase content, and thermal properties. A thermal analyzer was used to perform thermal conductivity testing on 10 commercially available mullite refractories as part of the analysis....
Author(s): A. A. Wereszczak, B. A. Pint, H. Wang, J. G. Hemrick, K. C. Liu, M. Karakus, R. E. Moore, T. P. Kirkland
The authors present a method of fiber-reinforced aerogel composites by impregnation of four layers of aligned glass fibers into silica sol layer-by-layer. The effect of different fiber alignments, as well as the effect of fiber lamination on the mechanical strength of the silica aerogel composites was investigated. In addition to this, the thermal conductivity of each composite was determined. The objective of this work was to investigate whether it is ...
Author(s): Anmin Cao, Huijun Wu, Moran Wang, Shuai Yin, Yundan Liao, Yunfei Ding
The reaction to fire properties of three commercial coatings designed for steel structures were investigated. The coatings in this study were covering a glass fiber-reinforced epoxy composite. It was determined that the thermal barrier effectiveness of these coatings was dependent on the degree of expansion and the thermal conductivity of the expanded char. Using these two parameters, the required thickness of a coating that can enable a structure to withstand ...
Author(s): Baljinder K. Kandola, Piyanuch Luangtriratana, Serge Bourbigot, Sophie Duquesne