Search for dissertations about: "hardmetals"

Showing result 1 - 5 of 10 swedish dissertations containing the word hardmetals.

2. 1. Temperature dependent atomic-scale modeling of interfaces in cemented carbides

   Author : Martin Gren; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; hardmetals; analytical bond order potential; wetting; WC-Co; density functional theory; free energies; interfaces; complexions; cemented carbides; phase diagram;

   Abstract : Material properties can now be calculated directly from first principles using density functional theory (DFT) which has a great predictive power and can, in cases that are difficult to approach experimentally, provide crucial insights on the atomic and electronic level. Such cases include the thermodynamics of interfaces and surfaces which are crucial factors for the structure and macroscopic properties of many materials, where cemented carbides are one example. READ MORE

4. 2. Strength and Stability of Interfaces in Cemented Carbides

   Author : Mikael Christensen; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; adhesion; segregation; plastic deformation; microstructure; interfaces; electron structure calculations; cermets; sintering; infiltration; cemented carbides; grain boundaries; cutting tools; density-functional theory; hardmetals; WC-Co; wetting;

   Abstract : Cemented carbides are hard composite materials of great technological importance. They are widely used as tool materials in a large variety of applications where the demands on hardness and toughness are high, including e.g.≈mining, turning, cutting, and milling. READ MORE

5. 3. Atomic-scale modelling of interfaces in cemented carbides: wetting and strength

   Author : Martin Gren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; adhesion; density functional theory; hardmetals; cemented carbides; WC-Co; surfaces; interfaces; grain boundaries; wetting; phase boundaries;

   Abstract : Cemented carbides are composite materials of great technological and industrial importance. They have a unique combination of hardness and toughness and are therefore used widely as tool materials in applications where both high hardness and toughness are demanded. These applications include among others: mining, turning, cutting and milling. READ MORE

6. 4. Development of Cermet Microstructures during Sintering and Heat-Treatment

   Author : Jenni Zachrisson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; APFIM; EELS; cemented carbides; quantitative microanalysis; gradients; N ; TEM; EFTEM; hardmetals; EDX; Ti C; light elements;

   Abstract : The work presented in this thesis is concerned with the microstructure of Ti(C, N) based cermet materials used in cutting tool applications. Several techniques have been used to study the microstructure of cermets, in particular transmission electron micro-scopy in combi-na-tion with energy dispersive X-ray analysis and electron energy-loss spectroscopy, energy-filtered transmission electron micro-scopy, atom-probe field-ion microscopy and scanning electron microscopy. READ MORE

7. 5. Effect of carbon content on microstructure and performance of a cermet cutting tool material

   Author : Jenni Zackrisson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; atom-probe; TEM; SEM; microanalysis; hardmetals; cemented carbides;

   Abstract : .... READ MORE