Microstructure and Nanoindentation response of Si<sub>3</sub>N<sub>4</sub>-Reinforced Magnesium-based Composite Synthesized by Powder Metallurgy Route: Fid-Bau Portal

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Microstructure and Nanoindentation response of Si₃N₄-Reinforced Magnesium-based Composite Synthesized by Powder Metallurgy Route

Balikai, Ankita / Adarsha, H. / Keshavamurthy, R.

This paper reports the development and characterization of magnesium (AZ91D) alloy-based composites strengthened with silicon nitride (Si₃N₄) particles as reinforcements through the powder metallurgy (P/M) technique. The percentage of Si₃N₄ particles was varied from 0 to 10 weight percent in steps of 2.5 weight percentage. Ball milling was adapted to ensure uniform dispersion of Si₃N₄ particles in magnesium alloy; the ball-milled composite powders were compacted at a pressure of 60 mpa using a hydraulic press at room temperature. The compact green specimen was sintered in a tubular furnace at a temperature of 610 °C for 4 h. Microstructure studies showed homogenous dispersion of Si₃N₄ particles in AZ91D magnesium alloy. X-ray diffraction (XRD) pattern confirmed the presence of Si₃N₄ particles in magnesium alloy. The measured density of the developed composites increased with an increase in Si₃N₄ reinforcements. The addition of Si₃N₄ particles remarkably improved the hardness of the composite. Hardness and Young’s modulus were determined by the nanoindentation technique.

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Microstructure and Nanoindentation response of Si₃N₄-Reinforced Magnesium-based Composite Synthesized by Powder Metallurgy Route

Balikai, Ankita / Adarsha, H. / Keshavamurthy, R.

This paper reports the development and characterization of magnesium (AZ91D) alloy-based composites strengthened with silicon nitride (Si₃N₄) particles as reinforcements through the powder metallurgy (P/M) technique. The percentage of Si₃N₄ particles was varied from 0 to 10 weight percent in steps of 2.5 weight percentage. Ball milling was adapted to ensure uniform dispersion of Si₃N₄ particles in magnesium alloy; the ball-milled composite powders were compacted at a pressure of 60 mpa using a hydraulic press at room temperature. The compact green specimen was sintered in a tubular furnace at a temperature of 610 °C for 4 h. Microstructure studies showed homogenous dispersion of Si₃N₄ particles in AZ91D magnesium alloy. X-ray diffraction (XRD) pattern confirmed the presence of Si₃N₄ particles in magnesium alloy. The measured density of the developed composites increased with an increase in Si₃N₄ reinforcements. The addition of Si₃N₄ particles remarkably improved the hardness of the composite. Hardness and Young’s modulus were determined by the nanoindentation technique.

Microstructure and Nanoindentation response of Si₃N₄-Reinforced Magnesium-based Composite Synthesized by Powder Metallurgy Route

Balikai, Ankita / Adarsha, H. / Keshavamurthy, R.

This paper reports the development and characterization of magnesium (AZ91D) alloy-based composites strengthened with silicon nitride (Si₃N₄) particles as reinforcements through the powder metallurgy (P/M) technique. The percentage of Si₃N₄ particles was varied from 0 to 10 weight percent in steps of 2.5 weight percentage. Ball milling was adapted to ensure uniform dispersion of Si₃N₄ particles in magnesium alloy; the ball-milled composite powders were compacted at a pressure of 60 mpa using a hydraulic press at room temperature. The compact green specimen was sintered in a tubular furnace at a temperature of 610 °C for 4 h. Microstructure studies showed homogenous dispersion of Si₃N₄ particles in AZ91D magnesium alloy. X-ray diffraction (XRD) pattern confirmed the presence of Si₃N₄ particles in magnesium alloy. The measured density of the developed composites increased with an increase in Si₃N₄ reinforcements. The addition of Si₃N₄ particles remarkably improved the hardness of the composite. Hardness and Young’s modulus were determined by the nanoindentation technique.

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Title:

Microstructure and Nanoindentation response of Si₃N₄-Reinforced Magnesium-based Composite Synthesized by Powder Metallurgy Route

Additional title:

J. Inst. Eng. India Ser. D

Contributors:

Balikai, Ankita (author) / Adarsha, H. (author) / Keshavamurthy, R. (author)

Published in:

Journal of The Institution of Engineers (India): Series D ; 103 ; 235-247

Publication date:

2022-06-01

Size:

13 pages

ISSN:

2250-2130 , 2250-2122

DOI:

https://doi.org/10.1007/s40033-021-00304-y

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Magnesium alloy AZ91D , Silicon nitride (Si<sub>3</sub>N<sub>4</sub>) , Compact sintering , Metal-matrix composites , Powder metallurgy Engineering , Engineering, general

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