Hard and tough boron suboxide based composites
Source abstract
Abstract
Boron Suboxide (B6O) powder was synthesized at temperatures of about 1400 oC from the reaction of boron and boric acid powders. The synthesized B6O powders were hot pressed at 1900 oC and at pressures of 50 MPa. Additionally to pure B6O materials, composites with Aluminum were prepared. The microstructure and properties of the sintered compacts were investigated. The addition of Aluminum in the composites results in the formation of an additional Aluminum Borate phase. The composites showed a similar hardness (~30GPa) as the pure B6O samples but an increased fracture toughness (~3.5MPa.m1/2).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Boron and Carbon Nanomaterials Research · MXene and MAX Phase Materials
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References (11)
Show source-provided references
1. Superhard boron-rich borides and studies of the B–C–N system10.1016/0921-5093(95)10095-4 ↗
2. High pressure, high temperature synthesis and characterization of boron suboxide (B6O)10.1021/cm970433+ ↗
3. Boron suboxide: as hard as cubic boron nitride10.1063/1.1494860 ↗
4. High pressure sintering of B6O powder and properties of the sintered compact10.2472/jsms.47.1000 ↗
5. High pressure consolidation of B6O–diamond mixtures10.1023/A:1012499214307 ↗
6. B6O-c-BN composites prepared by high-pressure sintering10.1111/j.1151-2916.2000.tb01224.x ↗
7. Microstructure and mechanical properties of B6O–B4C sintered composites prepared under high pressure10.1023/A:1004753116816 ↗
8. I. Sigalas, G. Davies, T. Shabalala, M. Herrmann, Method of improving the fracture toughness of boron suboxide, WO2007029102.
9. A critical evaluation indentation techniques for measuring fracture toughness. I. Direct crack measurements10.1111/j.1151-2916.1981.tb10320.x ↗
10. Mechanical properties of hot pressed boron suboxide and boron
11. B.F. Goosey, Method of fabricating boron suboxide articles, US3816586, June 1974.