Titanium diboride–silicon carbide–boron carbide ceramics with super‐high hardness and strength | Zendy

Neuman Eric W. | Zendy; BrownShaklee Harlan J. | Zendy; Hilmas Gregory E. | Zendy; Fahrenholtz William G. | Zendy

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Titanium diboride–silicon carbide–boron carbide ceramics with super‐high hardness and strength

Author(s) -

Neuman Eric W.,

BrownShaklee Harlan J.,

Hilmas Gregory E.,

Fahrenholtz William G.

Publication year - 2018

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.15201

Subject(s) - materials science , ceramic , boron carbide , indentation , titanium diboride , vickers hardness test , fracture toughness , composite material , silicon carbide , indentation hardness , titanium carbide , titanium , hot pressing , flexural strength , carbide , metallurgy , microstructure

Triplex particulate composites composed of boride and carbide ceramics were found to have high strength, hardness, and fracture toughness values. Two compositions consisting of 70:15:15 and 1:1:1 volume ratios of TiB 2, SiC, and B 4 C were produced from commercially available powders by hot‐pressing. The 70:15:15 ceramic exhibited a strength of ~1.3 GP a, while the 1:1:1 ceramic had a strength of ~0.9 GP a. These strengths are comparable to super‐strong Y 2 O 3 ‐ PSZ and β‐SiAl ON based composites. The Vickers’ hardness values of these ceramics were ~32 GP a for indent loads of 9.8 N. Hardness increased as indentation load decreased. The 1:1:1 ceramic had a hardness of ~53 GP a at an indentation load of 0.49 N, higher than values reported for so‐called “super‐hard” ceramics, and comparable to c‐ BN .

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