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Addition of ZrC to ZrB2 is favored to improve the fracture toughness of ZrB2. In this paper, ZrB2-ZrC composite nanofibers with eutectic composition are fabricated by electrospinning and carbothermal reduction. The precursors prepared by electrospinning are smooth and uniform. ZrB2-ZrC composite nanofibers could be fabricated by heat-treatment of precursors at 1300 °C in argon. Heat-treatment temperature influences the crystalline structure and grain size of nanofibers. The diameter of ZrB2-ZrC composite nanofibers is about 250 nm. The mole ratio of ZrB2 and ZrC in the nanofibers is 47:53, very close to the eutectic composition of ZrB2-ZrC composites. Some amorphous carbon is present in the nanofibers. The effect of heat-treatment temperature on amorphous carbon content is analyzed. The interface between ZrB2 and ZrC nano-grains is characterized.

Calcium phosphate cement (CPC)/small intestinal submucosa (SIS) composite scaffold was prepared in this work by subtly stacking bio-inspired Haversian motifs (lamellar cylindrical motifs), which can form a structure similar to the Haversian microstructure in natural bones. SIS is rich in collagen and CPC can be easily transformed to hydroxyapatite into body fluids, making the components of the scaffold similar to natural bones. Porosity and specific surface area of the scaffold were 32 ± 0.58%, and 26.749 ± 2.691 m 2 /m 3 respectively. Pore size mainly ranges from 100 μm to 400 μm. The large specific surface area and the pore size are not only beneficial to cells attachment, growth, migration and revascularization, but also to the scaffold mineralization. After soaking for 6 h at 10× simulated body fluids, the compressive strength of the scaffold was about 27 MPa, 3 times more than that of the original scaffold. Thanks to the increasing compressive strength with holding the soaking time, the scaffold should be suitable for in vivo implanting and bone remodeling.