Search for dissertations about: "cubic boron nitride"

Showing result 1 - 5 of 20 swedish dissertations containing the words cubic boron nitride.

  2. 1. Theoretical modelling of thin film growth in the B-N system

    Author : Björn Mårlid; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Boron nitride; boron; theoretical modelling; DFT; surface processes; surfaces; thin films; growth ALD; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : 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. READ MORE

  4. 2. Theoretical Investigations of Boron Related Materials Using DFT

    Author : Igor Arvidsson; Karin Larsson; Jan-Otto Carlsson; Robert Jones; Uppsala universitet; []
    Keywords : Inorganic chemistry; boron nitride; density functional theory; chemical vapour deposition; atomic layer deposition; surface reactivity; adsorption; abstraction; computational chemistry; Oorganisk kemi;

    Abstract : 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. READ MORE

  5. 3. Microstructure of a cubic boron nitride tool material before and after hard turning

    Author : Jenny Angseryd; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EELS; cBN; microstructure; PCBN; adherent layer; EDX; wear; SEM; EFTEM; TEM;

    Abstract : 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. READ MORE

  6. 4. Growth and microstructure of reactive sputter deposited boron nitride : carbon (BN:C) thin films

    Author : Mats P. Johansson; Linköpings universitet; []
    Keywords : ;

    Abstract : 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. READ MORE

  7. 5. Theoretical Routes for c-BN Thin Film Growth

    Author : Johan Karlsson; Karin Larsson; Sven Ulrich; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cubic boron nitride; chemical vapor deposition; density functional theory; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Abstract : 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. READ MORE