Fabrication and characterization of aluminum nitride/boron nitride nanocomposites by carbothermal reduction and nitridation of aluminum borate powders

Takafumi Kusunose, Nobuaki Sakayanagi, Tohru Sekino, Yoichi Ando

研究成果: Article査読

13 被引用数 (Scopus)

抄録

In order to fabricate aluminum nitride/boron nitride (AlN/BN) nanocomposites by pressureless sintering, the present study investigated the synthesis of AlN-BN nanocomposite powders by carbothermal reduction and nitridation of aluminum borate powders. Homogeneous mixtures of alumina (Al 2O 3), boric acid (H 3BO 3), and carbon powder were used to synthesize AlN/BN nanocomposite powders containing 10 and 20 vol% BN. Aluminum borate was produced by reacting Al 2O 3 and B 2O 3 above 800°C, and AlN and turbostratic BN (t-BN) were produced by reacting aluminum borate with carbon powder and nitrogen gas at 1500°C. Carbothermal reduction followed by nitridation yielded an AlN/BN nanocomposite powder composed of nanosized AlN and t-BN. By pressureless sintering nanocomposite AlN/BN powders containing 5 wt% Y 2O 3, AlN/BN nanocomposites were obtained without compromising the high thermal conductivity and high hardness.

本文言語English
ページ(範囲)5846-5853
ページ数8
ジャーナルJournal of Nanoscience and Nanotechnology
8
11
DOI
出版ステータスPublished - 2008 11月 1

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 生体医工学
  • 材料科学(全般)
  • 凝縮系物理学

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