Effect of B and Ti on the directionally solidified microstructure of the Nb–Si alloys

Sun, Zheng; Guo, Xiping; Guo, Bin

doi:10.1016/j.ijrmhm.2015.04.015

Cited by 19 publications

(2 citation statements)

References 18 publications

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“…B elements can refine the grain size and improve the toughness of materials. Studies have shown that the borosilicate glassy layer formed by B and Si in Mo-Si-B alloys has a good repairing effect on cracks and holes in oxide scales [61][62][63][64][65][66], which is of great significance to ameliorate the comprehensive properties. Zhang et al [65] prepared the Nb-22Ti-16Si-5Cr-4Hf-3Al alloy with different contents of B and studied the effect of B on the microstructure and properties of the alloy.…”

Section: Nb-si-based Alloys Modified With B Elementsmentioning

confidence: 99%

Microstructure and Oxidation Behavior of Nb-Si-Based Alloys for Ultrahigh Temperature Applications: A Comprehensive Review

Shen

et al. 2021

Coatings

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Nb-Si-based superalloys are considered as the most promising high-temperature structural material to replace the Ni-based superalloys. Unfortunately, the poor oxidation resistance is still a major obstacle to the application of Nb-Si-based alloys. Alloying is a promising method to overcome this problem. In this work, the effects of Hf, Cr, Zr, B, and V on the oxidation resistance of Nb-Si-based superalloys were discussed. Furthermore, the microstructure, phase composition, and oxidation characteristics of Nb-Si series alloys were analyzed. The oxidation reaction and failure mechanism of Nb-Si-based alloys were summarized. The significance of this work is to provide some references for further research on high-temperature niobium alloys.

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Section: Nb-si-based Alloys Modified With B Elementsmentioning

confidence: 99%

Microstructure and Oxidation Behavior of Nb-Si-Based Alloys for Ultrahigh Temperature Applications: A Comprehensive Review

Shen

et al. 2021

Coatings

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“…Widely applied nickel-based superalloys can no longer meet the requirements of high-performance aviation engine materials at temperatures above 1200 • C. [1][2][3] Niobium-based superalloys possess low density and remarkable elevatedtemperature properties, which gives them great potential in the applications of aircraft engines. [4][5][6][7] Furthermore, niobium acts as an essential alloying element in Zr-niobium alloys widely used in fusion energy, particularly in the field of fission-type space reactors. [8,9] At present, numerous researchers have studied niobium and its alloys through experimental and simulation methods.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature, stress, and grain size on behavior of nano-polycrystalline niobium

Yan 晏,

Zhang 张,

zhang 张

et al. 2024

Chinese Phys. B

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Atomic simulations were executed to investigate the creep responses of nano-polycrystalline (NC) niobium established by employing the Voronoi algorithm. The effects of varying temperature, applied stress, and grain size (GS) on creep properties and mechanisms were investigated. Notably, the occurrence of tertiary creep was exclusively observed under conditions where the applied stress exceeded 4.5 GPa and the temperature surpassed 1100 K. This phenomenon can be attributed to the significant acceleration of grain boundary and lattice diffusion, driven by the elevated temperature and stress levels. It was found that the strain rate increases with an increase in both temperature and stress. However, an interesting trend was observed where the strain rate decreases as the grain size increases. The stress and temperature are crucial parameters governing the creep behavior. As these factors intensify, the creep mechanism undergoes sequential transitions: initially from lattice diffusion under low stress and temperature conditions, subsequently evolving to a mixed mode incorporating both grain boundaries (GBs) and lattice diffusion at moderate stress and temperature levels, and ultimately culminating in a disruption of the power-law controlled creep behavior, inclusive of grain boundary recrystallization for high stress and temperature conditions. This comprehensive analysis provides a deeper understanding of the intricate creep behavior of nano-polycrystalline niobium and its dependence on various physical parameters.

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Role of Boron Element on the Electronic Properties of α-Nb5Si3: A First-Principle Study

Pan

Lin

2017

Journal of Elec Materi

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Effect of B and Ti on the directionally solidified microstructure of the Nb–Si alloys

Cited by 19 publications

References 18 publications

Microstructure and Oxidation Behavior of Nb-Si-Based Alloys for Ultrahigh Temperature Applications: A Comprehensive Review

Microstructure and Oxidation Behavior of Nb-Si-Based Alloys for Ultrahigh Temperature Applications: A Comprehensive Review

Influence of temperature, stress, and grain size on behavior of nano-polycrystalline niobium

Role of Boron Element on the Electronic Properties of α-Nb5Si3: A First-Principle Study

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