Project title: Cubic boron nitride/diamond composite films
Cubic boron nitride (cBN, a
III-V nitride material analogue to diamond) has a set of extreme properties
similar to diamond, making it an unique material for many applications extending
from tool productions to electronic devices. Cubic BN nitride is the best
material for machining steel and other ferrous alloys due to its outstanding
chemical stability and hardness. Cubic BN is potentially a superior
semiconductor material to diamond as well because both n- and p-type
conductivities of cBN are easier to achieve.
Nevertheless, the existing methods cannot provide cBN
films of the quality required for either mechanical or electronic
applications. BN films grown have normally a layered structure with an
interfacial amorphous/turbostratic BN (aBN/tBN) layer between
substrates and cBN films. Our previous works show
that diamond can be used as a universal interlayer to grow pure (i.e.,
without non-cubic BN interfacial forms), adherent cBN
Suitable for: M.Phil. or Ph.D.
Prerequisites: A BSc degree in Physics, Chemistry, Engineering and Materials Science.