Fabrication of high thermal conductive Al–cBN ceramic sinters by high temperature high pressure method

Wang, P.F.; Li, Zh.H.; Zhu, Yumei

doi:10.1016/j.solidstatesciences.2011.01.023

Cited by 19 publications

(12 citation statements)

References 28 publications

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“…Cubic boron nitride (c-BN) has some outstanding properties, such as hardness, chemical inertness, high temperature stability, and high thermal conductivity (e.g., [7][8][9]). The zinc-blende structure of c-BN is a face-centered-cubic lattice with spacegroup F-43m.…”

Section: Introductionmentioning

confidence: 99%

In situ Raman spectroscopy of cubic boron nitride to 90 GPa and 800 K

Ono

Mibe

Hirao

et al. 2015

Journal of Physics and Chemistry of Solids

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a b s t r a c tThe temperature and pressure dependences of the Raman spectrum of the transverse-optical mode of cubic boron nitride were calibrated for applications to a Raman spectroscopy pressure sensor in optical cells to about 800 K and 90 GPa. A significant deviation from linearity of the pressure dependence is confirmed at pressures above 20 GPa. At ambient temperature, dv/dP slopes are 3.41(7) and 2.04 (7) cm À 1 /GPa at 0 and 90 GPa, respectively. A polynomial expression is used to fit the pressuretemperature dependence of the Raman line. The pressure dependence does not significantly change with temperature, as determined from experiments conducted up to 800 K. At 0 GPa, the dv/dP slope is 3.46 (7) cm À 1 /GPa at 800 K. At pressures above 90 GPa, the Raman spectrum of the transverse-optical mode cannot be observed because of an overlap of the signals of cubic boron nitride and diamond used as the anvils in the high-pressure cell.

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Section: Introductionmentioning

confidence: 99%

In situ Raman spectroscopy of cubic boron nitride to 90 GPa and 800 K

Ono

Mibe

Hirao

et al. 2015

Journal of Physics and Chemistry of Solids

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“…Para o sistema cBN-Al Wang e colaboradores encontraram em uma análise de DSC um pico proveniente dessa transformação em 1462ºC [6]. A alta difusão do alumínio liquido, assim como, a reações entre o Al e o cBN são fatores que promovem uma alta sinterabilidade do sistema cBN-Al, promovendo um grande aumento de sua densificação, figura 2 [15]. Outra propriedade que tem um aumento significativo com o aumento da quantidade de Al é a condutividade térmica [15].…”

Section: A Importância Do Al Na Sinterização Do Cbnunclassified

“…Variação da densidade relativa e porcentagem de AlN versus Al para sinterizados cerâmicos Al-CBN[15] Se com aumento da quantidade relativa de Al na sinterização as propriedades como condutividade e densificação tem uma melhora significativa, outras propriedades como dureza podem ter um decréscimo[9]. Foi o que demostrou McKie em seu trabalho, além de comparara os resultados de dureza com a quantidade de Al, também comparou com a granulometria do cBN.…”

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Processamento, Características E Propriedades Do Nitreto Cúbico De Boro – Uma Revisão Atualizada

Silva¹,

Picanço²,

Skury³

et al. 2017

Anais Do Congresso Anual Da ABM

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Resumo Apresenta-se uma revisão das características e propriedades do nitreto cúbico de boro (cBN) bem como de diferentes tipos de processamento. A influência da adição de ligantes e a formação de compósitos com outras cerâmicas são também revistas. Finalmente, destaca-se a grande importância prática do cBN como cerâmica de elevada dureza na substituição do diamante em ferramentas de corte. Palavras-chave: Nitreto cúbico de boro, cBN, sinterização, dureza, aplicações. PROCESSING, CHARACTERISTICS AND PROPERTIES OF CUBIC BORON NITRIDE-A UPDATED REVIEW Abstract A review of the characteristics and properties of cubic boron nitride (cBN) is presented, including different processing methods. The influence of bonding substances as well as other ceramic composites is also reviewed. Finally, it is highlighted the great practical importance of the cBN as a ceramic with elevated hardness in substitution for diamond in cutting tools.

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“…Some work has been conducted to investigate the preparation and characterisation of cBN-based composites from cBN–Al mixtures. After sintering at HPHT, new phases such as AlN and AlB 2 appeared [3,5-7]. AlN grains were always found between cBN and AlB 2 grains [5].…”

Section: Introductionmentioning

confidence: 99%

“…The reactions between cBN and Al started at ∼900°C and the reaction products strongly depended on Al content [3]. During sintering, the formation of boundary phase (AlN, AlB 12 ) with high hardness would impede the transformation from cBN to hexagonal boron nitride (hBN) [6]. Moreover, hardness of cBN-based composites sintered from cBN–Al mixtures decreased with increasing cBN grain size and increasing Al content, while fracture toughness did not show a clear tendency with changing Al content [7].…”

Section: Introductionmentioning

confidence: 99%

Compositions, mechanical properties and microstructures of cBN-based composites sintered with Al or TiC

Yang

Yue

Gong

et al. 2017

Advances in Applied Ceramics

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Cubic boron nitride (cBN)-based composites were prepared from cBN-Al and cBN-TiC mixtures, respectively, under high pressure and high temperature (HPHT). During sintering, Al reacted with cBN and produced AlN and AlB 2 , while TiC did not react with cBN. With increasing Al from 5-20 wt-%, the strength of the cBN-based composites decreased first, then increased. AlN and AlB 2 could strengthen the cBN-based composites to a certain extent. In the preparation from cBN-TiC, 10 wt-% addition of TiC was the optimal formulation to obtain the densest microstructure. Hardness of the two kinds of composites displayed different tendencies. On the other hand, cBN-based composites were treated at 1200°C for 1200 s. It was found that the isothermal oxidation process could be described by parabolic laws with slight oxidation scales formed on samples' surfaces in different morphologies.

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Fabrication of high thermal conductive Al–cBN ceramic sinters by high temperature high pressure method

Cited by 19 publications

References 28 publications

In situ Raman spectroscopy of cubic boron nitride to 90 GPa and 800 K

In situ Raman spectroscopy of cubic boron nitride to 90 GPa and 800 K

Processamento, Características E Propriedades Do Nitreto Cúbico De Boro – Uma Revisão Atualizada

Compositions, mechanical properties and microstructures of cBN-based composites sintered with Al or TiC

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