摘要:
An apparatus for generating an aerosol powder from a melt includes an atomization die (110) having an orifice (111) through which the melt (400) passes to create the powder. The orifice is in the size range at and immediately above that which is just sufficient to permit continuous generation of such powder. The die 110 may be included in a high-temperature probe 100 suitable for immersion in the melt, so that accumulated accretions of powder on the walls of the probe may be melted off by heating the probe.
摘要:
An apparatus for generating an aerosol powder from a melt includes an atomization die (110) having an orifice (111) through which the melt (400) passes to create the powder. The orifice is in the size range at and immediately above that which is just sufficient to permit continuous generation of such powder. The die 110 may be included in a high-temperature probe 100 suitable for immersion in the melt, so that accumulated accretions of powder on the walls of the probe may be melted off by heating the probe.
摘要:
Un dispositif permettant de produire une poudre aérosol à partir d'un matériau en fusion comprend une matrice d'atomisation (110) possédant un orifice (111) au travers duquel passe le matériau en fusion (400) pour créer la poudre. L'ordre de grandeur de l'orifice est égal ou immédiatement supérieur à la dimension suffisant à permettre la production continue d'une telle poudre. La matrice (110) peut être comprise dans une sonde à haute température (100) indiquée pour être plongée dans le matérau en fusion, de manière à pouvoir éliminer par fusion, en chauffant la sonde, les accrétions de poudre sur ses parois.
摘要:
Soluble gas is introduced in a melt material which is then atomized and rapidly cooled. The cooling drives the gas from solution, further disintegrating the atomized material to an ultra-fine powder. In one embodiment the atomization and rapid cooling are effected using a gas atomization die. Introduction of the soluble gas may be effected by addition of reactive constituents to the melt, for reactively forming such gas. Finer powders with desirable metallurgical properties are formed using a metallic melt.