ALUMINUM NITRIDE ACTIVATED AND SINTERED UNDER SHOCK PRESSURE
Xue Honglu;Hong Yanji(National University of Defense Technology,Changsha,410073,China)
The shock-activated ALN powder can be sintered under pressure without additionof assisting agents.After the action of the shock waves,the ALN powder are accumulated con-siderable surface energy and defect energy,In this way we create a new process for the procedureof sintering.After accomplishing a large number of experiments,we have confirmed in the endthat the particle size of the powder decreases at first under the actoin of the shock wave,but it in-creases in the later. The microstrain of the powder increases steepenly as a result of the raising ofthe pressure amplitude of the shock wave. In summary,we have shown from an amount of ex-periments that by means of the activation of ALN powder by shock waves with an amplitude of 8～12 GPa, such activated powder shows really a considerable promotion of the sintering abillity.
【CateGory Index】： O383