Study of the atomic structure and phase separation in amorphous Si-C-N ceramics by X-ray and neutron diffraction

被引：51

作者：

Schempp, S ^{[1
]}

Durr, J ^{[1
]}

Lamparter, P ^{[1
]}

Bill, J ^{[1
]}

Aldinger, F ^{[1
]}

机构：

[1] Max Planck Inst Met Res, D-70174 Stuttgart, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 1998年 / 53卷 / 3-4期

关键词：

D O I：

10.1515/zna-1998-3-405

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Amorphous Si37C32N31 and Si37C29N34 ceramics were produced by pyrolysis of a polyhydromethylsilazane precursor. Their structure was investigated by X-ray and neutron diffraction. Wide angle diffraction showed that the Si-atoms are preferentially bonded to nitrogen atoms, but also bonding to carbon atoms was found. This suggests that the excess carbon atoms form an amorphous graphite-like phase. Small angle scattering revealed that the ceramics are inhomogeneous. The evolution of the phase separation during annealing was investigated and it was concluded that amorphous Si3N4 precipitates grow in the Si-C-N materials. The results are compared with previous results for amorphous Si24C43N33 produced from a polysilylcarbodiimide precursor [1 - 3].

引用

页码：127 / 133

页数：7

共 15 条

[1] X-ray and neutron small angle scattering with Si-C-N ceramics using isotopic substitution [J].