Synthesis and dynamic compaction of ceramic nano powders by techniques based on electric pulsed power

被引：52

作者：

Ivanov, V ^{[1
]}

Kotov, YA ^{[1
]}

Samatov, OH ^{[1
]}

Bohme, R ^{[1
]}

Karow, HU ^{[1
]}

Schumacher, G ^{[1
]}

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE,INST NEUTRONENPHYS & REAKTORTECH,D-76021 KARLSBURG,GERMANY

来源：

NANOSTRUCTURED MATERIALS | 1995年 / 6卷 / 1-4期

关键词：

D O I：

10.1016/0965-9773(95)00054-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Studies on the production of nanometer-sized powders by the exploding wire method were conducted. The aim of the work was to attain a particle distribution with a high yield of particles below 20 nm in size. Powders of alumina and titania were generated during the experiments by maintaining a definite partial pressure of oxygen inside the explosion chamber. The particles are spherical in shape with specific surfaces up to 100 m(2)/g. The output capacity is on the order of 1 kg/h with an energy consumption of 2 kWh/kg. Alumina powders crystallize in the gamma and delta structures, titania powders consist of anatase and rutile. The second part of the studies deals with the compaction of nano-sized powders by application of pulsed electromagnetic power. For the compaction of nano-sized Al2O3, powder pressure pulses in the range from 1 GPa to 5 GPa, lasting 3 - 300 mu s, were applied. The simply shaped bulk samples maintained a nano-crystalline structure and reached 62 to 83% of the theoretical density.

引用

页码：287 / 290

页数：4