Showing papers by "Zhuangjun Fan published in 2003"
TL;DR: In this paper, fine-grained B4C-SiC/C composites were fabricated using a ball-milling dispersion process, and the surface morphology of the composites after isothermal oxidation at 800, 1200 and 1400°C was examined by scanning electron microscopy (SEM).
24 citations
Patent•
09 Jul 2003
TL;DR: The preparation method of carbon/ceramics composite material includes the following steps: firstly, mixing petroleum coke or asphalt coke, doping particles and adhesive for 10-15 min, in high-speed mixing machine to obtain premixed powder, placing the premixed powders its ball grinding machine, adding solvent and dispersing agent, grinding for 5-100 hr., making the ground mixture undergo the process of reduced pressure distillation treatment, breaking it to 60-100 meshes, finally hot-pressing and forming so as to obtain the invented product with high strength, high heat
Abstract: The preparation method of carbon/ceramics composite material includes the following steps: firstly, mixing petroleum coke or asphalt coke, doping particles and adhesive for 10-15 min, in high-speed mixing machine to obtain premixed powder, placing the premixed powder its ball grinding machine, adding solvent and dispersing agent, grinding for 5-100 hr., making the ground mixture undergo the process of reduced pressure distillation treatment, breaking it to 60-100 meshes, finally hot-pressing and forming so as to obtain the invented product with high strength, high heat-conductivity and low electric resistance.
9 citations
TL;DR: In this article, the B4C-SiC/C composite has been shown to possess an excellent inhibitory effect against air oxidation at temperature above 1000 ◦C due to formation of glassy borosilicate coating covered the active sites on the surface.
Abstract: Graphite materials are attractive materials for high temperature applications because of their high sublimation temperature above 3000 ◦C and high thermal shock resistance. They have been used as the structural materials at high temperature, such as rocket nozzles and hightemperature heat exchangers, etc. [1]. However, the application of carbon materials is limited by oxidation under oxidizing conditions at temperatures above 500 ◦C. This oxidation process results in the erosion of structure and eventually in the degradation of properties. Therefore, the improvement of oxidation resistance of graphite materials is one of the important problems to be solved, as reported by many workers [2–6]: It was well known that graphite with multilayered or functionally gradient coatings exhibited excellent oxidation resistance behavior [7], whereas there are still some critical problems such as cracking and debonding caused by thermal expansion mismatch between coating and substrate. The doping of ceramic particles in carbon substrate can solve the above cracking problem. Among the various combination of carbon and different kinds of ceramics, the B4C-SiC/C system has been found to possess an excellent inhibitory effect against air oxidation at temperature above 1000 ◦C due to formation of glassy borosilicate coating covered the active sites on the surface [6, 8]. However the temperature at which the B4C-SiC/C composite shows excellent oxidation resistance is limited, to our knowledge, there is no report on the B4C-SiC/C composite with excellent oxidation resistance above 1200 ◦C to date. Therefore it is essential
7 citations
7 citations