Abstract:
Die Erfindung betrifft einen zellularen Werkstoff (1), umfassend einen porösen zellularen Werkstoff (2), in welchem ein Werkstoff (3) dispergiert vorliegt und ein Verfahren zu dessen Herstellung.
Abstract:
L'invention se rapporte à un poudre constituée essentiellement d'agrégats à base de nitrure de bore, ladite poudre présentant une composition chimique globale, en pourcentages massiques,comprenant entre 40et 45% de bore, entre 53et 57% d'azote,moins de 400 ppm poids de calcium, moins de 5%, au total, d'autres éléments, plus de 90% de nitrure de bore, borne incluse, en pourcentages poids et sur la base de la totalité des phases cristallisées, une circularité moyenne supérieure ou égale à 0,90, une taille médiane de pores inférieure ou égale à,5µmet une porosité ouverte inférieure ou égale à 55%.
Abstract:
A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a plurality of polycrystalline superabrasive particles made of surface functionalized superabrasive particle The surface functionalized superabrasive particles may have halogens or organic moiety instead of hydrogen.
Abstract:
A method of making sintered abrasive particles includes passing alumina precursor particles through a flame under conditions such that they are converted to alpha alumina. The precursor particles comprise a precursor of alpha alumina and have an average particle size of less than or equal to 500 microns. Sintered abrasive particles have a cellular microstructure comprising alpha alumina crystal grains of alpha alumina having a maximum dimension of less than about 3 microns are also disclosed. The sintered abrasive particles have an average particle size of less than or equal to 500 microns, and are essentially free of seed particles and alpha alumina grain size modifiers. Abrasive articles comprising a binder and a plurality of the sintered abrasive particles are also disclosed.
Abstract:
A method for preparing zinc oxide nanostructures using arc discharge is disclosed. The method comprises the provision of an anode and a cathode in an arc discharge chamber. Current is supplied to the anode and the cathode to establish an arc discharge between the cathode and the anode to vaporise the anode and produce zinc oxide nanostructures. Contemplated is the use of the zinc oxide nanostructures to produce components that have applications in, for example, optoelectronics, energy storage devices, field emission devices, and sensors such as UV photosensors, gas sensors and humidity sensors. Disclosed is a gas sensor and method for its production, where said method comprises the provision of a sensor substrate comprising a conducting thin film at least partially covering at least two regions on at least one surface of a sensor substrate material to define a gap in the conducting thin film, the application of a mixture of zinc oxide nanostructures and a non-ionic polymer to at least a portion of the gap in the conducting thin film to thereby bridge the gap. Optionally contemplated is a step of annealing the mixture of zinc oxide nanostructures and non-ionic polymer applied to said sensor substrate to produce the sensor component.
Abstract:
The invention relates to a method for preparing a silicon/carbon composite material consisting of silicon particles coated with carbon, whereby the following successive steps are carried out: silicon particles are mixed with a solution of a polymer without oxygen in a solvent, by which means a dispersion of silicon particles is obtained in the polymer solution; the dispersion obtained in step a) is subjected to an atomisation-drying operation by which means a silicon/polymer composite material consisting of silicon particles coated with the polymer is obtained; and the material obtained in step a) is subjected to pyrolysis, enabling the production of the silicon/carbon composite material consisting of silicon particles coated with carbon.