Sökning: "cubic Boron Nitride"
Visar resultat 1 - 5 av 21 avhandlingar innehållade orden cubic Boron Nitride.
1. Theoretical modelling of thin film growth in the B-N system
Sammanfattning : In vapour phase deposition, the knowledge and control of homogeneous and heterogeneous reactions in connection to precursor design may lead to the deposition of the desired material; structure or phase. This thesis is a document attempting to increase the knowledge of film growth in the B-N system. LÄS MER
2. Theoretical Investigations of Boron Related Materials Using DFT
Sammanfattning : In the history of Chemistry, materials chemists have developed their ideas mainly by doing experiments in laboratories. The underlying motivation for this laboratory work has generally been pure curiosity or the ambition to find a solution to a specific problem. LÄS MER
3. Microstructure of a cubic boron nitride tool material before and after hard turning
Sammanfattning : AbstractPolycrystalline cubic boron nitride (PCBN) materials are widely used in turning of hardened steels due to their beneficial mechanical properties like high hardness at elevated temperatures and, compared to diamond, for being more chemically stable towards iron at temperatures typical for turning operations (800-1000˚C). The wear of PCBN tools is influenced by several factors, like machining parameters, different tool geometries and varying composition of PCBN tools as well as workpiece material. LÄS MER
4. Growth and microstructure of reactive sputter deposited boron nitride : carbon (BN:C) thin films
Sammanfattning : Growth, microstructure and mechanical properties of boron nitride: carbon (BN:C) have been studied in films prepared by reactive r.f. diode sputter deposition as well as by reactive unbalanced d.c. LÄS MER
5. Theoretical Routes for c-BN Thin Film Growth
Sammanfattning : Cubic boron nitride (c-BN) has been in focus for several years due to its interesting properties. The possibility for large area chemical vapor deposition (CVD) is a requirement for the realization of these different properties in various applications. Unfortunately, there are at present severe problems in the CVD growth of c-BN. LÄS MER