Boron Nitride Ceramic Tool

Intermetallic composites imc for evaporator boats and other components.

Boron nitride ceramic tool.

Boron nitride chemical formula bn synthetically produced crystalline compound of boron and nitrogen an industrial ceramic material of limited but important application principally in electrical insulators and cutting tools. Gregormarwick gregsy liked this post 10 01 2020 07 05 pm 8. Recently pcbn has gained acceptance as a friction stir tool material especially for high temperature alloys 3. Polycrystalline cubic boron nitride pcbn was originally developed for the turning and machining of tool steels cast irons and super alloys 3 71.

Hbn is the low density phase that has been widely used as a heat resistant and electrically insulating material. Ceramic binders can be used as well. Polycrystalline cubic boron nitride cbn is a cutting tool material with excellent hot hardness that can be used at very high cutting speeds. P d pcd tbrr 375 n pctbrr375n 375 187 tbrr 500 n pctbrr500n 500 250 tbrr 750 n pctbrr750n 750 375.

It is made in two crystallographic forms hexagonal boron nitride h bn and cubic boron nitride c bn. It also exhibits good toughness and thermal shock resistance. Resin porous ceramics and soft metals are used. Modern cbn grades are ceramic composites with a cbn content of 40 65.

Its unique properties from high heat capacity and outstanding thermal conductivity to easy machinability lubricity low dielectric constant and superior dielectric strength make boron nitride a truly outstanding material. For grinding applications softer binders e g. Boron nitride is an advanced synthetic ceramic material available in solid and powder form. Materials with cubic boron nitride crystals are often used in the tool bits of cutting tools.

A new form of cubic boron nitride is used for coating machining tools in high power and high speed electronics scientists at north carolina university have managed to create a new phase of the ceramic cubic boron nitride c bn that will have future applications in developing high power and high speed electronics.