Nucleation, growth and characterization of cubic boron nitride (cBN) films

2007 ◽  
Vol 40 (20) ◽  
pp. 6159-6174 ◽  
Author(s):  
W J Zhang ◽  
Y M Chong ◽  
I Bello ◽  
S T Lee
Keyword(s):  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Nucleation Growth

Embedding of Micro Thin Film Sensors Into Polycrystaline Cubic Boron Nitride (PCBN) for Potential Tooling Applications Via Diffusion Bonding

2008 ◽  
Author(s):  
Dirk Werschmoeller ◽  
Xiaochun Li
Keyword(s):  
Thin Film ◽  
Boron Nitride ◽  
Diffusion Bonding ◽  
Cubic Boron Nitride ◽  
Embedded Sensors ◽  
Thin Film Sensors ◽  
Increase Tool Life ◽  
Pcbn Tools ◽  
Microfabrication Techniques

Polycrystalline cubic boron nitride (PCBN) is increasingly being used in manufacturing processes to increase tool life and processing speed. Existing sensors in PCBN tools are unable to provide accurate time- and space-resolved measurements of the thermo-mechanical phenomena at and near the tool-work interface. Using microfabrication techniques along with diffusion bonding, thin film palladium-13wt% chromium (PdCr) alloy micro strain gage sensors were successfully embedded into PCBN structures for potential tooling applications. This article reports on the design, fabrication and characterization of a sensor consisting of three PdCr sensing elements embedded into a PCBN sample. The embedded sensors show good linearity and sensitivity.

Characterization of luminous-cubic boron-nitride single-crystals doped with Eu3+ and Tb3+ ions

2005 ◽  
Vol 87 (21) ◽  
pp. 211913 ◽  
Author(s):  
Atsuko Nakayama ◽  
Takashi Taniguchi ◽  
Yoichi Kubota ◽  
Kenji Watanabe ◽  
Shunichi Hishita ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Single Crystals ◽  
Cubic Boron Nitride

Preparation and Characterization of Polycrystalline Cubic Boron Nitride (PcBN) Compacts by a Pressureless Sintering Process

2010 ◽  
Vol 105-106 ◽  
pp. 38-41 ◽  
Author(s):  
Zhen Huo Ren ◽  
Rui Zhang ◽  
Hai Long Wang ◽  
De Liang Chen ◽  
Ming Liang Li
Keyword(s):  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Cost Effective ◽  
Sintering Behavior ◽  
Pressureless Sintering ◽  
X Ray Diffraction ◽  
Polycrystalline Cubic Boron Nitride ◽  
Air Atmosphere ◽  
Sintering Method

A novel cost-effective pressureless sintering method has been developed to prepare polycrystalline cubic boron nitride (PcBN) compacts. The effect of feldspar as sintering aids was analyzed in this paper. Various amounts of feldspar from 5 to 15 wt% were added to cBN powders, and the pressureless sintering was conducted at temperatures ranging from 900°C to 1200°C under an air atmosphere. The microstructure, phase, density and microhardness of the as-obtained PcBN compacts were measured and correlated to amounts of Si added and to sintering temperatures. The sample showed superior sintering behavior in comparison to those fabricated using hot pressed sintering. The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that feldspar diffused homogeneously and tightly bonded with cBN. But hBN appeared when the sintering temperature even at 900°C, which dramatically affected the property of PcBN compacts. A PcBN compact with a relative density of 91% was obtained at 1100°C and its microhardness was as high as 1000HV.

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