ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Highly porous vitrified bonded grinding wheels were produced by selective extraction of butyl carbamate pore inducer using supercritical (sc) CO2. Butyl carbamate was found to be an excellent pore inducer, as the extraction was fast and the desired pore structure was obtained. The investigation revealed that the extraction was controlled by the solubility of butyl carbamate in scCO2 and the flow direction had a large effect on extraction times. The solubility of butyl carbamate determined from cloud point measurements was found to be high at moderate conditions. Grinding tests demonstrated that scCO2 pore-induced wheels performed slightly better then conventionally produced wheels at the conditions investigated. The power required for grinding, wheel wear, and part quality were comparable with those of conventionally produced wheels at low metal removal rates. However, the extracted wheels outperformed the conventional wheel at high metal removal rates, indicating the scCO2 processing produces a slightly superior product than that made by conventional means. Liquefaction of the pore inducer during extraction had a minor effect on the final properties of the wheel.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1551-2916.2005.00276.x
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