Effect of Mg addition on microstructural, mechanical and environmental properties of Nb–Si eutectic composite

Tiwary, Chandra Sekhar; Kashyap, Sanjay

doi:10.1016/j.msea.2012.09.056

Cited by 20 publications

(4 citation statements)

References 23 publications

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“…However, these alloys have low room temperature ductility and fracture toughness. In a series of work, Kashyap et al explored ternary addition (Ga, Al, In, Mg, and Ni) in the eutectic composition that can reduce interlamellar spacing and modify the morphologies [207][208][209][210][211]. The submicron spacing results in an improvement in ductility and fracture toughness (Fig.…”

Section: Bcc Metal Silicidesmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

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Section: Bcc Metal Silicidesmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

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“…The oxidation of binary alloy is already described in one of our previous work 13,14. The Si is added in Nb base alloy, as it forms stable Si oxide 20. At the top surface, one observes mixed oxide.…”

Section: Resultsmentioning

confidence: 82%

“…13,14 The Si is added in Nb base alloy, as it forms stable Si oxide. 20 At the top surface, one observes mixed oxide. However, the subsequent layer consists of Nb rich oxide, which breaks down and spoils on prolonged oxidation treatment.…”

Section: Oxidation Behaviourmentioning

confidence: 99%

Effect of indium addition on microstructural, mechanical and oxidation properties of suction cast Nb–Si eutectic alloy

Tiwary

Kashyap

2013

Materials Science and Technology

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The paper reports effect of small ternary addition of In on the microstructure, mechanical property and oxidation behaviour of a near eutectic suction cast Nb-19?1 at-%Si-1?5 at-%In alloy. The observed microstructure consists of a combination of two kinds of lamellar structure. They are metal-intermetallic combinations of Nb ss -b-Nb 5 Si 3 and Nb ss -a-Nb 5 Si 3 respectively having 40-60 nm lamellar spacings. The alloy gives compressive strength of 3 GPa and engineering strain of y3% at room temperature. The composite structure also exhibits a large improvement in oxidation resistance at high temperature (1000uC).

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“…[3][4][5][6] In recent years, the use of alloying and optimizing processing techniques has improved mechanical properties at room temperature. Kashyap et al [7][8][9] studied that the addition of In, Al, and Mg significantly improved the mechanical properties and oxidant properties of Nb-Si alloy. In addition, theoretical studies show the bulk modulus/shear modulus (B/G) ratio of 1.54 [10] of Nb 5 Si 3 alloy, meaning that this alloy is a brittle material.…”

Section: Introductionmentioning

confidence: 99%

Influences of Vacancy Concentration and Al Substitution on Structural, Electronic, and Elastic Properties of Nb₅Si₃ from First‐Principles Calculations

Zeng

Zhu

et al. 2021

Physica Status Solidi (b)

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The effects of vacancy concentration and Al substitution on the structural, electronic, and elastic properties of Nb5Si3 are studied using first‐principles calculations. The formation energy, elastic modulus, and electronic properties of three different Nb vacancies in Nb5Si3 are discussed in detail. With the increase in vacancy concentration, the obtained shear modulus, Young's modulus, and hardness of Nb vacancy decrease, which are lower than those of pristine Nb5Si3. The bulk modulus/shear modulus (B/G) ratio increases with the increase in Nb vacancy concentration. However, these vacancies result in the transition from brittleness to ductility, and Nb5Si3 with 5% vacancy concentration exhibits ductile behavior. The calculation of electronic structure shows that these Nb vacancies change the local hybridization between Nb and Nb atoms. As the concentration increases, the position of the peak moves toward lower energy. It is predicted that vacancies can improve the ductility behavior of Nb5Si3.

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Effect of Mg addition on microstructural, mechanical and environmental properties of Nb–Si eutectic composite

Cited by 20 publications

References 23 publications

Five decades of research on the development of eutectic as engineering materials

Five decades of research on the development of eutectic as engineering materials

Effect of indium addition on microstructural, mechanical and oxidation properties of suction cast Nb–Si eutectic alloy

Influences of Vacancy Concentration and Al Substitution on Structural, Electronic, and Elastic Properties of Nb₅Si₃ from First‐Principles Calculations

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Effect of Mg addition on microstructural, mechanical and environmental properties of Nb–Si eutectic composite

Cited by 20 publications

References 23 publications

Five decades of research on the development of eutectic as engineering materials

Five decades of research on the development of eutectic as engineering materials

Effect of indium addition on microstructural, mechanical and oxidation properties of suction cast Nb–Si eutectic alloy

Influences of Vacancy Concentration and Al Substitution on Structural, Electronic, and Elastic Properties of Nb5Si3 from First‐Principles Calculations

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Influences of Vacancy Concentration and Al Substitution on Structural, Electronic, and Elastic Properties of Nb₅Si₃ from First‐Principles Calculations