Studies of gravity behaviors in the course of producing AlN and TiC materials (III)

The first and preliminary investigation of AlN composites thermal-treated u nder normal gravity and microgravity conditions by using chemical ovens was conducted during aircraft parabolic flights. The results indicated that, d ifferent microstructures in the samples are associated with gravity level d uring parabolic flight, and microgravity condition allows the synthesis of AlN-borosilicate glass composite with improved microstructure, as compared with that under the terrestrial rendition. It is favorable to produce AlN-b orosilicate glass composites with a relatively uniform distribution of comp osition and structure. Finally, the use of chemical oven and the potential of material synthesis under microgravity condition are appreciated.