Effect of Al additive on the formation of cubic boron nitride in Li3N–hBN system under HPHT

Guo, Wei-Li; Jia, Xiaopeng; Shang, Jian Ku; Xu, Haoran; Ma, Hongan

doi:10.1016/j.jcrysgro.2010.08.051

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“…Many studies on sintering of cBN with Al binder have provided many worthy informationsin the past [13]. Forming AlN, AlB 2 or AlB 12 under high pressure and high temperature (HPHT)conditions [2,14], and they also haverevealed the excellent mechanical properties of PAC. Conventionally, Al powder was directly mixed into cBN powderin sintering of CBN-Al.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of the PcBN-Alcomposites are Improved by Pressure Infiltration

Duan

Kou

et al. 2015

AMR

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PcBN–Al composites（PAC）have been synthesized by pressure infiltration(PI) and a general mixing method(GM)[1-3] with a wide grain sizes range of 4-25 um and a wide temperature range of 1200-1600°C at 5.0 GPa,respectively.Hardness ranged between 30and 40 GPa, while the flank wear (Vb) reached 0.12mm when it finished 4000m in cutting test ofPAC synthesized by PI method. Hardness ranged between 25 and 35GPa, while the flank wear (Vb) reached 0.14 mm when it finished 4000mof PAC synthesized by GM method. The homogeneity of PcBN–Al synthesized by PI have been improved compared with GM. PI is a superior method to synthesize PAC in the field of mechanical properties.

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Section: Introductionmentioning

confidence: 99%