Protective properties and structure of amorphous alumophosphate coatings for niobium alloys

被引：0
|
作者：
Sichinava, MA [1 ]
Kobyakov, VP
Sedmale, GP
机构：
[1] Russian Acad Sci, Inst Struct Macrokinet & Problems Mat Sci, Moscow, Russia
[2] Tech Univ, Inst Silicate Mat, Riga, Latvia
来源：
REFRACTORIES AND INDUSTRIAL CERAMICS | 2000年 / 41卷 / 5-6期
关键词：
Niobium; Protective Coating; Liquid Glass; Thermal Test; Aluminum Phosphate;
D O I：
10.1007/BF02693815
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：
Results of thermal tests of specimens of a niobium alloy with a protective coating in gas media with various contents of oxygen are described. The microhardness of the metal under the coating and the coating itself has been studied before and after the tests. The near-contact regions of the metal and the coating have been studied with the help of electron microscopy, x-ray spectral microprobe, and x-ray phase analyses. Data on the structure and the elemental sind phase compositions of the near-contact regions are presented. The processes that occur in the formation and subsequent long-term annealing of the coating and that cause structural changes in it are described, which provide cohesion between the substrate and the coating and a high efficiency of protection.
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页码：165 / 168
页数：4
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