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Study of rare-earth oxide sintering additive systems for Spark Plasma Sintering AlN ceramics

机译:放电等离子烧结AlN陶瓷稀土氧化物烧结助剂体系的研究

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摘要

Dense aluminum nitride (AlN) ceramics were prepared by Spark Plasma Sintering with rare-earth oxide and CaF_2 as multiple components sintering additives. The effect of sintering additives on the density, phase composition, microstructure and thermal conductivity of AlN ceramics was investigated. The results showed that Spark Plasma Sintering could fabricate dense AlN ceramics with superior thermal properties in a very short time. The multiple components sintering additives not only promoted den-sification through liquid-phase sintering but also improved thermal conductivity by decreasing oxygen impurities. Thermal conductivity of samples sintered with 2 wt.% Sm_2O_3-1 wt.% CaF_2 was higher than those of other samples. During the Spark Plasma Sintering process, the microstructures played a key role in controlling the thermal conductivity of AlN ceramics.
机译:以稀土氧化物和CaF_2为多组分烧结助剂,通过放电等离子烧结制备了致密的氮化铝(AlN)陶瓷。研究了烧结助剂对AlN陶瓷密度,相组成,微观结构和导热系数的影响。结果表明,等离子烧结可以在很短的时间内制造出具有优良热性能的致密AlN陶瓷。多组分烧结助剂不仅通过液相烧结促进了致密化,而且还通过减少氧杂质而提高了导热性。用2重量%的Sm_2O_3-1重量%的CaF_2烧结的样品的热导率高于其他样品。在放电等离子烧结过程中,微结构在控制AlN陶瓷的导热性中起着关键作用。

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  • 来源
    《Materials Science and Engineering》 |2010年第20期|P.5268-5272|共5页
  • 作者单位

    Department of Materials Science and Engineering, Harbin Institute of Technology, No. 92 West Da-zhi Street, Harbin 150001, PR China;

    rnDepartment of Materials Science and Engineering, Harbin Institute of Technology, No. 92 West Da-zhi Street, Harbin 150001, PR China;

    rnDepartment of Materials Science and Engineering, Harbin Institute of Technology, No. 92 West Da-zhi Street, Harbin 150001, PR China;

    rnDepartment of Materials Science and Engineering, Harbin Institute of Technology, No. 92 West Da-zhi Street, Harbin 150001, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    AlN ceramics; sintering additives; thermal conductivity; microstructure;

    机译:AlN陶瓷;烧结助剂;导热系数;微观结构;

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