Structure and Properties of Composite Materials Sintered at High Pressure and Reinforced with Amorphous Boron Particles

I. N. Lukina; Лукина И. Н.; O. P. Chernogorova; Черногорова О. П.; E. I. Drozdova; Дроздова Е. И.; E. A. Ekimov; Екимов Е. А.

doi:10.31857/S0044453723010193

Structure and Properties of Composite Materials Sintered at High Pressure and Reinforced with Amorphous Boron Particles

Autores: Lukina I.¹, Chernogorova O.¹, Drozdova E.¹, Ekimov E.²
Afiliações:
1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
2. Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences
Edição: Volume 97, Nº 1 (2023)
Páginas: 21-25
Seção: ПАМЯТИ Н.А. БУЛЬЕНКОВА
URL: https://journals.rcsi.science/0044-4537/article/view/136510
DOI: https://doi.org/10.31857/S0044453723010193
EDN: https://elibrary.ru/BCKIXS
ID: 136510

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Resumo

Metal matrix composite materials (CMs) reinforced with boron particles are synthesized from powders of amorphous boron and metal (Ni, Ti) at a pressure of 8 GPa and temperatures of 500–1000°C. It is established that amorphous boron crystallizes during synthesis at temperatures above 800°С. Amorphous boron particles are characterized by a hardness of ~30 GPa, an indentation modulus of elasticity of up to 270 GPa, and an elastic recovery of more than 60%. The patterns of boride formation during high-pressure synthesis are studied. It is shown that the wear resistance of a Ni–B CM synthesized at 600°С grows by more than 30 times, relative to the wear resistance of pure nickel. Reinforcing titanium with 30% amorphous boron increases wear resistance by more than two orders of magnitude, but the coefficient of friction of CMs is reduced slightly.

Palavras-chave

composite materials, amorphous boron, thermobaric synthesis, crystallization, hardness, tribological properties

Bibliografia

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