Comparisons between thermal modeling and experiments: effects of substrate preheating

被引：18

作者：

Dai, K ^{[1
]}

Li, XX ^{[1
]}

Shaw, LL ^{[1
]}

机构：

[1] Univ Connecticut, Inst Mat Sci, Dept Met & Mat Engn, Storrs, CT 06268 USA

来源：

RAPID PROTOTYPING JOURNAL | 2004年 / 10卷 / 01期

关键词：

lasers; thermal testing; thermal conductivity; thermal output;

D O I：

10.1108/13552540410512507

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A three-dimensional thermal finite element model including the effect of the powder-to-solid transition has been developed to investigate the transient temperature distribution and effects of substrate preheating during laser densification of dental powder bed for the layer-by-layer fabrication. The model encompasses the effects of the temperature- and porosity-dependent thermal conduction and radiation as well as the temperature-dependent natural convection. Substrate preheating is found to be important in preventing the formation of cracks in the dental porcelain body during laser densification. The simulation results are found to match the experiments very well.

引用

页码：24 / 34

页数：11

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