Abstract
The method principally employed at the present time for determining the amount of free carbon in boron carbide is chemical analysis. There are two well-known chemical methods: the direct determination of Cfree, and an indirect determination based on the overall composition (Btot and Ctot). The direct chemical analysis for Cfree is based on treating the boron carbide with a chromic mixture and plotting a graph of the amount of CO2 evolved against the period of oxidation. However, in treating the sample with the chromic mixture partial oxidation of the boron carbide itself occurs, and the results of the chemical analysis for Cfree may therefore be too high. Furthermore, it is assumed in both chemical methods that the boron carbide is always of the same composition given by the formula B4C, while the Cfree is the proportion of the carbon actually free [5]. The assumption as to the constant composition of the carbon and boron carbide leads to a second assumption, namely, that the properties of the two phases, and in particular their oxidizability, remain constant.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
