对橡胶等静压成型(Rubber isostatic pressing,RIP)制备纳米Y-TZP陶瓷作了初步研究.研究结果表明,通过RIP成型,可以获得相对密度较高、体积较大的ZrO2(3Y)素坯,并在较低温度下无压烧结得到纳米Y-TZP陶瓷.在1100℃下烧结2h所得的Y-TZP陶瓷的相对密度可达97％,晶粒仅为70nm左右.相对密度较高、平均孔径小是RIP成型素坯烧结温度低的主要原因.
A new forming method called RIP was applied to fabricate Y-TZP nano ceramics. With RIP, a high pressure of about 1GPa was attained; a green compact
with a weight of about 16g and a relative density of about 56% wasobtained. Y-TZP nano-ceramics having a grain size of about 70nm were
obtained when sintered at 1100℃ for 2h. The results show that the sintering ability of the green compact is so good that it can be sintered to 97% at a low
temperature of 1100℃. The relative high density of the green compact and the small pore size are the main reasons for the excellent
sintering ability.
参考文献
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