In order to get a homogenous mixture and compact of TiB2-A12O3,hybridization as a surface modification method was used to prepare nano-scale Al2O3 coated TiB2 particles.PE-wax particles were first coated onto TiB2 particles by hybridization,and then the nano-scale Al2O3 particles were coated onto the surface of TiB2 coated by PE-wax particles again.SEM,TEM and EDS were used to characterize the microstructure of as-received core/shell particles and its compacts.The experimental results show that a particle-scale homogenous dispersion of TiB2 and Al2O3 can be formed not only in mixed powder but also in dewaxed compacts.The compacts then were sintered by gas-pressing sintering(GPS).Finial products show improved mechanic properties comparing with reference samples fabricated by normal ways.
参考文献
| [1] | Murthy TSRC;Basu B;Balasubramaniam R;Suri AK;Subramanian C;Fotedar RK .Processing and properties of TiB2 with MoSi2 sinter-additive: A first report[J].Journal of the American Ceramic Society,2006(1):131-138. |
| [2] | S. Liu;W. Zhang .Research on microstructure of in situ synthesized TiB_2/Ni metal-ceramics composite coating[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2005(1/2):146-150. |
| [3] | Tang WJ;Fu ZY;Zhang JY;Wang W;Wang H;Wang YC;Zhang QJ .Fabrication and characteristics of TiB2/Al2O3 core/shell particles by hybridization[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2006(3):117-123. |
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