Preparation of the Boron Nitride Fibers by Chemical Reaction

Zhi Qiang Cheng; Hong Lin Yu; Ling Li; Yong Li; Xiao Li Zhang; Hong Yi Jiang

doi:10.4028/www.scientific.net/AMR.66.191

Paper Titles

Effect of Processing Parameters on the Microstructure of Silicon Nitride Coatings by Chemical Vapor Deposition
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Graphitic N-Free/N-Doped Nanostructured Carbon Molecular Sieves via CVD Method and their Hydrogen Storage
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Laser Energy Dependent Structure of Pulsed Laser Deposited Barium Dititanate Films
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Synthesis and Performance of Nanocrystalline 5083 Aluminum Alloy Powders by Cryomilling
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Preparation of the Boron Nitride Fibers by Chemical Reaction
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(TiB₂)pNi/Ni₃Al/Metals Graded Materials Prepared by the Field-Activated and Pressure-Assisted Combustion Process
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Impact of Carbon Nanotube Aspect Ratio and Dispersion on Epoxy Nanocomposite Performance
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Preparation and Characterization of Pt/YSZ Composite Electrode
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Laser Cladding of Zr_52.5Cu_17.9Ni_14.6Al₁₀Ti₅/TiC Composite Coating on AZ91D Magnesium Alloy for Improvement of Wear Resistance
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 66Preparation of the Boron Nitride Fibers by...

Preparation of the Boron Nitride Fibers by Chemical Reaction

Abstract:

In this study, boron nitride (BN) fibers were prepared via chemical method using boric acid as the raw material, under the atmosphere of NH3 and N2, respectively. Firstly, the boric acid was heated to melt in order to acquire B2O3 fibers. Secondly, the B2O3 fibers were pre-azotized under a NH3 atmosphere and held for 1 h at 970°C, and the sample was then sintered in N2 to the temperature of 2000°C and held for 1 h. The obtained samples were texted to analyze nitrogen content, morphology, tensile strength, and elastic modulus by neutralization titration, SEM, XRD and so on. The results show that the diameter of the BN fibers is ~ 4-6 μm with the nitrogen content of 54%, tensile strength of 1400 MPa, and elastic modulus of 120 GPa.