Effect of molecular monomer structure on the composition and properties of BN via the preceramic polymer route

被引：10
|
作者：
Lei, Yongpeng [1 ]
Wang, Yingde [1 ]
Song, Yongcai [1 ]
Wang, Hao [1 ]
Xie, Zhengfang [1 ]
Deng, Cheng [1 ]
机构：
[1] Natl Univ Def Technol, Coll Aerosp & Mat Engn, Key Lab Adv Ceram Fibers & Composites, Changsha 410073, Hunan, Peoples R China
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 07期
关键词：
Molecular structure; Polymers; Ceramics; Microstructure; Thermal properties; BORON-NITRIDE FIBERS; OXIDATION RESISTANCE; PDCS ROUTE; PRECURSOR; CERAMICS; ALKYLAMINOBORAZINE;
D O I：
10.1016/j.matlet.2011.01.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Boron nitride (BN) ceramics were prepared via the preceramic polymer route from two (alkylamino)borazine (AAB) monomers. The effect of monomer structure on the chemical composition. microstructure, oxidation resistance and high-temperature stability of BN was investigated. The two ceramics were characterized by elemental analysis (EA). IR, XPS, XRD, HRTEM and TGA. With similar composition, BN derived from symmetric monomer had a higher crystallinity and exhibited better oxidation resistance/high temperature stability. This is due to that the structure of symmetric molecular derived polymeric precursor is close to that of hexagonal BN (h-BN). (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1111 / 1113
页数：3
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