In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 33, No. 11 ( 2018-06-13), p. 1659-1670
Abstract:
Boron carbide (B 4 C) is an attractive material for numerous applications including vehicle armor, cutting tools, blasting nozzles, and abrasive powder, owing to its extreme hardness, high melting point, high Young’s modulus, and excellent thermoelectric properties. However, the application of B 4 C is limited by the high-temperature synthesis process. The present work aims to explore a low-temperature manufacturing process for synthesizing B 4 C with a small amount of free carbon. Poly(resorcinol borate) with an aromatic structure and high char yield was chosen as the aromatic polymeric precursor. A combination of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Raman spectroscopy was performed to investigate the influences of the reaction temperature and holding time on the changes in the precursor microstructure. The results indicate that the rod-like structure of crystalline B 4 C is successfully synthesized at 600 °C, and the free carbon can be reduced to about 0.8 wt% in the final product. This is because the pyrolysis temperature controlled the carbon content of the B 4 C, which led to an enlarged contact domain between B 2 O 3 and carbon, and a relatively low-temperature synthesis of B 4 C.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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