18-07-2013 дата публикации
Номер: US20130184143A1
The disclosure provides novel graphene-reinforced ceramic composites and methods for making such composite materials. 1. A ceramic composite material comprising a graphene-reinforced ceramic material.2. The ceramic composite material of claim 1 , wherein the graphene is present in the graphene-reinforced ceramic material at between about 0.02% to about 1.5% on a volume percentage basis.3. The ceramic composite material of claim 1 , wherein the graphene is present in the graphene-reinforced ceramic material at between about 0.5% to about 1.5% on a volume percentage basis.4. The ceramic composite material of claim 1 , wherein the graphene is present in the ceramic composite material as two or more graphene sheets.5. The ceramic composite material of claim 1 , wherein the graphene is homogenously dispersed throughout the ceramic composite material.6. The ceramic composite material of claim 1 , wherein the graphene comprises graphene that is present at one or more grain boundaries of the ceramic material.7. The ceramic composite material of claim 6 , wherein the graphene present at the one or more grain boundaries comprises one or more graphene sheets.8. The ceramic composite material of claim 6 , wherein the graphene present at the one or more grain boundaries comprises one or more graphene platelets9. The ceramic composite material of claim 1 , wherein the ceramic material comprises SiN.10. The ceramic composite material of claim 9 , wherein the SiNis predominately α-SiN.11. A method for making a ceramic composite material claim 9 , comprising(a) combining graphene with a ceramic material; and(b) densifying the combination to produce a graphene-reinforced ceramic material.12. The method of claim 11 , wherein the graphene and the ceramic material are each mixed with cationic surfactant prior to the combining step.13. The method of claim 11 , wherein the graphene is present in the combination at between 0.5% to 1.5% on a volume percentage basis.14. The method of claim ...
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