Formation mechanism of B4C–TiB2–TiC ceramic composite produced by mechanical alloying of Ti–B4C powders

Rafiei, Mahdi; Salehi, Mahdi; Shamanian, M.

doi:10.1016/j.apt.2014.07.003

Cited by 32 publications

(2 citation statements)

References 27 publications

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“…Based on Fick`s second law, the concentration of B and C atoms in Ti matrix away from Ti-B 4 C interface can be calculated accordingly in Appendix B, and a schematic result is shown in Fig.7. It can be found that, the diffusion distance of C is much longer than that of B at the same diffusion time, agreeing well with previous report which pointed out that the diffusion velocity of C in Ti is much higher than that of B [25]. Since both B and C atoms are the decomposition products of B 4 C, the amount of B atoms should be higher than that of C. If we use the area of concentration curves and coordinate axis to represent the total amount of diffused B…”

Section: Reaction Behavior In Ti Matrixsupporting

confidence: 92%

Microstructural evolution and competitive reaction behavior of Ti-B4C system under solid-state sintering

Jia

Wang

Chen

et al. 2016

Journal of Alloys and Compounds

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By using experimental investigations and theoretical calculations, microstructural evolution and competitive reaction behavior of Ti-B 4 C system under solid-state sintering is confirmed. Firstly, B 4 C decomposes into B and C atoms followed by diffusing into Ti side immediately, and TiB whiskers form in Ti matrix. Then, Ti atoms diffuse into B 4 C via vacancies left by the diffused B and C atoms, leading TiB 2 and carbon substance to form in B 4 C side. Subsequently, reaction product carbon diffuses into Ti side and concentration of C in Ti side increases accordingly, resulting in the formation of TiC particles in Ti matrix. With further processing of reaction, both amount and size of products increases gradually. When TiB 2 phases grow into a monolithic layer, diffusion behavior between Ti and B 4 C is inhabited, carbon presents to be a loose layer between un-reacted B 4 C and TiB 2, and the in situ reaction also stops finally.

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Section: Reaction Behavior In Ti Matrixsupporting

confidence: 92%

Microstructural evolution and competitive reaction behavior of Ti-B4C system under solid-state sintering

Jia

Wang

Chen

et al. 2016

Journal of Alloys and Compounds

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“…It is known that the collision during the high-energy ball milling generally brings large mechanical energy, fracture, short-range diffusion, local high temperature and fusion to powder particles. As a result, the as-milled powder generally posscesses supersaturated solid solubility, disordered atom arrangement, large surface area and large distortional strain energy [15]. In the past decades, many kinds of amorphous alloys and ceramics had been synthesized by the mechanical alloying technique [16,17].…”

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confidence: 99%

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

Zhang

Jia

Yang

et al. 2018

SSP

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A mixture of cubic silicon powder, hexagonal boron nitride powder and graphite powder was mechanically alloyed for 30 hrs in argon. The as-milled 2Si-B-3C-N composite powder was heated up to 1900 °C in nitrogen, with a heating rate of 25 °C/min and under a pressure of 80 MPa. XRD and HRTEM results show that the as-milled 2Si-B-3C-N composite powder has a well amorphous structure. Under the current hot-pressing circumstances, the amorphous ceramic starts to crystallize at a temperature between 1800 °C and 1900 °C. Once the temperature is higher than crystallization temperature, crystallites appear in the amorphous matrix with a great nucleation rate, but a small growth rate. Hot pressed at 1900 °C for 0 mins or 10 mins, the prepared 2Si-B-3C-N bulk ceramic has an average grain size of 8.7 nanometers and 22.3 nanometers, respectively. After an intensive literature search, we believe the present work is the first one to make clear that it is possible to use the mechanical alloying route to prepare amorphous Si-B-C-N ceramic with such a high crystallization temperature.

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Corrosion and Tribocorrosion Behavior of Ti-B4C Composites Joined with TiCuNi Brazing Alloy

Sousa

Alves

Toptan

et al. 2019

J. of Materi Eng and Perform

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Formation mechanism of B4C–TiB2–TiC ceramic composite produced by mechanical alloying of Ti–B4C powders

Cited by 32 publications

References 27 publications

Microstructural evolution and competitive reaction behavior of Ti-B4C system under solid-state sintering

Microstructural evolution and competitive reaction behavior of Ti-B4C system under solid-state sintering

A Mechanically-Alloyed Amorphous 2Si-B-3C-N Ceramic with a Crystallization Temperature up to 1800°C

Corrosion and Tribocorrosion Behavior of Ti-B4C Composites Joined with TiCuNi Brazing Alloy

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