Microstructure and mechanical properties of textured TiB 2 ceramic fabricated by combination of catalyst and hot–forging

Liu, Xin; Pei, Jiahua; Liu, Minjing; Wang, Zhi; Liu, Lixin; Li, Jing; Wu, Zhanjun

doi:10.1016/j.matchemphys.2017.07.033

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Thus, TiB2-based ceramics have been regarded as a potential material for structural and functional applications. However, TiB2-based ceramics exhibits intrinsic brittleness, which impedes their practical application [4,5]. Many studies have reported that adding reinforcement into TiB2 matrix can improve its mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

Optimization of CNTs growth on TiB2-based composite powders by CVD with Fe as catalyst

Lin

Yang

Zhang

et al. 2020

Ceramics International

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Carbon nanotubes (CNTs) are successfully grown on the surface of TiB2 matrix by chemical vapor deposition with Fe as catalyst. However, CNT growth has to be improved before conducting integration procedures. The effects of synthesis conditions on the structure of CNT(Fe)-TiB2 are evaluated by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. Results indicate that with an increase in synthesis temperature, carbon yield increases because of the improvement in the initial growth rate of CNTs. The morphology of as-received carbon changes due to changes in surface roughness of TiB2. With an increase in Fe catalyst, the density and diameter of carbon particles increase as well because of the increased number of activity sites and agglomeration of Fe particles. As the gas flow rate of methane supply rises, the density and length of CNTs initially increase and then decrease. This behavior is attributed to the increase in carbon diffusion rate and decrease in contact time between the catalyst and the carbon precursor. As growth duration is extended, CNT growth initially improves because of the sufficient reaction time between the carbon precursor and the catalyst. However, the quality of CNTs subsequently decreases, and a large amount of amorphous carbon is produced owing to the aggregation of the carbon precursor, which leads to excessive concentration of Fe.

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Section: Introductionmentioning

confidence: 99%