2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 5: Composite, Ceramic, Quasi-crystals, Nanomaterials & Coatings
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 578 pages |
| ISBN: | 978-1-987820-07-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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PROCESSING OF BORON CARBIDE PARTICULATE SUBSTRATES BY DIRECT NITRIDATION
Martin Pech-Canul1; Jose C. Flores-Garcia1; Saul A. Gallardo-Heredia1; Hector M. Hernandez-Garcia2; Jorge Lopez-Cuevas1;1CINVESTAV-SALTILLO, Ramos Arizpe, Mexico; 2COMIMSA, Saltillo, Mexico;
Type of Paper: Regular
Id Paper: 192
Topic: 16
Abstract:
In this contribution, the authors present a study on the influence of various processing parameters in the formation of new phases on boron carbide porous particulate substrates via direct nitridation. A Taguchi experimental design allowed establishing the quantitative effect of atmosphere, time, temperature, and gas flow rate on phase type, amount and morphology of products. Afterwards, an optimization of the processing parameters on the formation of boron nitride was performed. According to the analysis of variance (ANOVA), the optimum conditions to maximize the amount of BN were: HPA (high purity air) atmosphere, 60 min, 1300°C and a flow rate of 60 cm3/min. The specimens were analyzed using FT-IR spectroscopy, XRD, SEM and EDS. The study was complemented with thermal analyses of the substrate and thermodynamic calculations using the FactSage® software and databases, in order to elucidate the formation of the different phases in the processed samples. Experimental results show the presence of new phases, including boron aluminate and boron nitride, which indicates that formation of BN on BC particles in nitrogen containing atmospheres by direct nitridation reactions is feasible.