| Autor: |
Ponomareva, D. V., Timoshchuk, E. I., Shirokov, R. E., Vasilyeva, E. V., Lyapin, I. I., Takhtin, V. Yu. |
| Zdroj: |
Inorganic Materials: Applied Research; Dec2023, Vol. 14 Issue 5/6, p1402-1407, 6p |
| Abstrakt: |
This article discusses the influence of the cell size of the initial template, solution concentration, and number of impregnation stages on the macrostructural and strength characteristics of glassy carbon foams produced by template synthesis. The Novolak resin SFP-012A2 was used as a carbon precursor; its coke residue is higher than 57 wt %. Increasing the number of impregnation stages makes it possible to improve the strength characteristics while maintaining open porosity at the level of 90%. The best set of properties is demonstrated by glassy carbon foam based on polyurethane template with a porosity of 60 pores/inch and four impregnation stages using a solution with a concentration of 30 wt % due to uniform wall thickening in the material. The ultimate compression strength is 1.12 MPa, which is two times higher than that of foreign analogs; the open porosity is 91%. A decrease in the cell size of initial templates can lead to embrittlement of the material due to the formation of clusters of overlapped cells. Increasing the mechanical strength of glassy carbon foams while maintaining an open-cell structure expands the range of applications for this class of materials. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink