Effects of heat treatment on properties of boron nitride fiber

被引：4
作者：
Li Duan [1 ]
Zhang ChangRui [1 ]
Li Bin [1 ]
Cao Feng [1 ]
Wang SiQing [1 ]
机构：
[1] Natl Univ Def Technol, Coll Aerosp & Mat Engn, State Key Lab Adv Ceram Fibers & Composites, Changsha 410073, Hunan, Peoples R China
来源：
SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2012年 / 55卷 / 05期
基金：
中国国家自然科学基金;
关键词：
boron nitride; fiber; heat treatment; oxidation; boron oxide; surface; CARBON-FIBER; PRECURSOR INFILTRATION; MATRIX COMPOSITES; FABRICATION; PYROLYSIS; RESISTANCE;
D O I：
10.1007/s11431-012-4750-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The boron nitride fibers were heated at the range of 600-1400 degrees C in flowing nitrogen and air, respectively, and the effects of heat treatment on the structure, composition and morphology of BN fibers were studied. The results showed that BN fibers exhibited smooth surfaces, and that t-BN was the main phase with a little B3O3 included. After heat treatment at 1400 degrees C in nitrogen atmosphere, the fibers displayed rough surfaces with little change in mass. Better crystallinity was obtained with the increasing temperature. During heat treatment in air, the fibers were oxidized severely as the temperature went up, especially at 1400 degrees C. The volatilization of B2O3, HBO2 and H3BO3 led to the pores on the surfaces of the fibers, while the boron oxide glaze and nitrogen gas produced during the oxidation process protected the fibers from further oxidation.
引用
收藏
页码：1376 / 1380
页数：5
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