A kind of high strength and toughness Ti(c,n) based cermet composite material and preparation method thereof
A ceramic composite material and a composite material technology are applied in the field of high-strength and tough Ti-based metal-ceramic composite materials and their preparation, and can solve the problems of insignificant toughening effect of metal-ceramic materials, unsatisfactory compatibility, restricting application and promotion, and the like. The effect of improving plasticity, wear resistance and impact toughness, and high chemical stability
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Embodiment 1
[0028] The CNT surface modification process in this embodiment is as follows: the CNTs are loaded into the chemical vapor deposition furnace, and the reaction gas CH is introduced 4 and carrier gas H 2 , Pyrocarbon coating (Pyc coating) with different thicknesses was obtained by chemical vapor deposition (CVD) at 950℃~1100℃ for different times, and the thickness of the obtained CNT pyrolytic carbon coating was 20 ~40nm.
[0029] The carbon fiber surface modification process of the present embodiment is as follows: the cut carbon fiber is loaded into a chemical vapor deposition furnace, and the reaction gas CH is fed into it. 4 and carrier gas H 2 , Pyrocarbon coating (Pyc coating) with different thicknesses was obtained by chemical vapor deposition (CVD) at 950 ℃ ~ 1100 ℃ for different times, and the thickness of the obtained carbon fiber pyrolytic carbon coating was 1 ~4 μm.
Embodiment 2
[0031] The Ti(C,N)-based cermet raw material formula in this example is: TiC (balance), 11wt% TiN, 12wt% Mo, 10wt% WC, 5wt% Co, 30wt% Ni, 1wt% Cr 2 C 3, 1wt% C, the sum of the mass percentages of raw materials is 100%. The above-mentioned raw material powder is put into a planetary ball mill for wet grinding and mixing, the ball milling medium is absolute ethanol, the ball-to-material ratio is 7:1, the ball milling speed is 360r / min, the ball milling time is 24h, and the ball-milled slurry is put into Dry in a vacuum drying oven for 12 hours at a drying temperature of 70 °C. The dried powder is mixed with 5wt% gasoline rubber solution as a molding agent for granulation. After granulation, the powder is passed through a 100-mesh sieve and molded under a pressure of 100 MPa. Press for 5min. The preformed samples were degummed at 200°C, 400°C, 600°C, and 800°C for 2h, 4h, 2h, and 2h. 2h, 2h, 20min and 20min in order to facilitate the sufficient diffusion of matrix elements dur...
Embodiment 3
[0033] The Ti(C,N)-based cermet raw material formula in this example is: TiC (balance), 11wt% TiN, 12wt% Mo, 10wt% WC, 5wt% Co, 30wt% Ni, 1wt% Cr 2 C 3 , 1wt% C, the sum of the mass percentages of the raw materials is 100%, and 2wt% of carbon fibers are added on this basis, and the carbon fibers are toughened fibers. Put the above-mentioned raw material powder into a planetary ball mill for wet grinding and mixing, the ball milling medium is absolute ethanol, the ball-to-material ratio is 7:1, the ball milling speed is 360 r / min, and carbon fiber is added after ball milling for 23 hours and continues ball milling for 1 hour. The slurry was dried in a vacuum drying box for 12 hours, and the drying temperature was 70 °C. The dried powder was mixed with 5wt% gasoline rubber solution as a molding agent for granulation. After granulation, the powder was passed through a 100-mesh sieve. Compression molding, holding pressure for 5min. The preformed samples were degummed at 200°C, 4...
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