INTERACTION OF SINGLE-CRYSTALLINE METAL FLUORIDES WITH TITANIUM-CONTAINING MELTS

被引:4
|
作者
Krasovskyy, V. P. [1 ]
机构
[1] Natl Acad Sci Ukraine, Frantsevich Inst Problems Mat Sci, Kiev, Ukraine
关键词
contact interaction; liquid lithium and magnesium fluorides; solid titanium substrates; gaseous titanium fluorides; wetting; AMORPHOUS-ALLOYS; TI; CONTACT;
D O I
10.1007/s11106-019-00083-y
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
The wetting of solid titanium substrates with liquid lithium and magnesium fluorides was studied by the sessile drop method in 1.10(-3) Pa vacuum at 1173 and 1553 K, respectively. Titanium and fluorine were found to actively interact in the systems to change the titanium substrate surface profile, leading to a 'crater' in the contact area. The 'solid titanium-liquid magnesium fluoride' interfacial geometry was examined and confirmed the potential to form gaseous products in the titanium-fluorine interaction. Such gaseous compounds prevent the wetting of alkaline-earth metal fluorides with titanium-containing melts at temperatures above 1400 K. This allows the materials made of alkaline-earth metal fluorides to be used as refractories for high-temperature melting, long-term homogenization, and casting of alloys with a high content of Ti, Zr, Hf, Nb, and V.
引用
收藏
页码:334 / 340
页数:7
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