PRESSURELESS SINTERING OF B۴C-NANOTiB۲ NANOCOMPOSITE BY ADDITION OF Fe AND Ni AS SINTERING AIDS

Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IJMSEI-11-4_006

تاریخ نمایه سازی: 26 مرداد 1402

Abstract:

B۴C and its composites with TiB۲ as second phase continues to be extensively used as the preferred ceramic material in military applications as armor systems for absorbing and dissipating kinetic energy from high velocity projectiles. It also exhibits a high melting point (۲۴۲۷ °C), and high neutron absorption cross section. Pressureless sintering of the B ۴C-nanoTiB۲ nanocomposite using small amount of Fe and Ni (≤۳ Wt%) as sintering aids was investigated in order to clarify the role of Fe and Ni additions on the mechanical and microstructural properties of B۴C-nanoTiB۲ nanocomposites. Different amount of Fe and Ni, mainly ۱ to ۳ Wt% were added to the base material. Pressureless sintering was conducted at ۲۱۷۵, ۲۲۲۵ and ۲۳۰۰ °C. It was found that Addition of ۳ Wt% Fe and ۳ wt% Ni and sintering at ۲۳۰۰ °C resulted in improving the density of the samples to about ۹۹% of theoretical density. The nanocomposite samples exhibited high density, hardness, and microstructural uniformity.

Authors

M. M. Mohammadi Samani

Malek-Ashtar University of Technology, Tehran, Iran.

H. R. Baharvandi

Malek-Ashtar University of Technology, Tehran, Iran.

H. Abdizadeh

School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran.

J. Rezapour

Malek-Ashtar University of Technology, Tehran, Iran.