论文信息 - The Effect of Stoichiometry on Mechanical Properties of Boron Carbide

The Effect of Stoichiometry on Mechanical Properties of Boron Carbide

The present investigation of the mechanical properties of chemically vapor-deposited boron carbides with varying B/C ratios has given attention to maximum hardness and fracture toughness values at near-stoichiometric composition. In the cases of nonstoichiometric boron carbides with B/C ratios greater than 4, these two values decreased with increasing B content, suggesting that excess B decreases the B4C structure's bond strength. Hardness and fracture toughness values at B/C ratios lower than 4 decrease, perhaps due to free carbon in the microstructure. 18 references.

K. Niihara | T. Hirai | A. Nakahira

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