Oriented apatite glass-ceramics by extrusion

被引：0

作者：

Moisescu, C ^{[1
]}

Jana, C ^{[1
]}

Carl, G ^{[1
]}

Habelitz, S ^{[1
]}

Rüssel, C ^{[1
]}

机构：

[1] Otto Schott Inst Glaschem, D-07743 Jena, Germany

来源：

PROCEEDINGS OF THE 6TH INTERNATIONAL OTTO SCHOTT COLLOQUIUM | 1998年

关键词：

D O I：

暂无

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the system SiO2 - Al2O3 - P2O5 - CaO - K2O - F-., glass-ceramics with needle-like apatite were produced. By means of subsequent extrusion, oriented glass-ceramics with needle shape apatite have been produced at temperatures corresponding to viscosities in the range of 10(7) to 10(8) dPas. The needle shape apatite crystals are oriented with their c-axes parallel to the extrusion direction. The degree of orientation was studied by means of XRD measurements. The influence of crystal alignment on the mechanical properties was studied. Vickers indentations show a decrease in the crack length perpendicular to the extrusion axis, whereas cracks, introduced parallel to the extrusion axis are longer. Hence, the K-\ c - values calculated show anisotropy.

引用

页码：150 / 155

页数：6

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