Abstract: A high temperature process is provided, which can melt, atomize and spheroidize a coarse angular powder into a fine and spherical one. It uses thermal plasma to melt the particle in a heating chamber and a supersonic nozzle to accelerate the stream and break up the particles into finer ones.

Abstract: The present application relates to a plasma atomization process and apparatus for producing metallic powders from at least one wire/rod feedstock. In the process, an electrical arc is applied between the at least one wire/rod feedstock, and a plasma torch is employed to generate a supersonic plasma stream at an apex at which the electric arc is transferred to the at least one wire/rod to melt and atomize the at least one wire/rod feedstock to produce the metallic powders. An anti-satellite diffuser is employed to prevent recirculation of the powders in order to avoid satellite formation.

Abstract: Examples are disclosed herein to implement remote authentication and passwordless password reset. An example server includes: at least one processor to forward executable instructions to a client device, the executable instructions, when executed at the client device, to cause the client device to: authenticate a user of an account based on a biometric authentication factor; obtain a local storage key by decrypting an encrypted local storage key with a cloud key obtained from a remote authentication server, the cloud key associated with the client device; decrypt a key bag with the local storage key, the key bag including a content encryption key and an encrypted credential encrypted with the content encryption key, the encrypted credential associated with the user; and decrypt the encrypted credential with the content encryption key to obtain a credential without the user supplying a master password associated with the account.

Abstract: An apparatus for producing metallic powders from molten feedstock includes a heating source for melting a solid feedstock into a molten feed, and a crucible for containing the molten feed. A liquid feed tube is also provided to feed the molten feed as a molten stream. A plasma source delivers a plasma stream, with the plasma stream being adapted to be accelerated to a supersonic velocity and being adapted to then impact the molten stream for producing metallic powders. The feed tube extends from the crucible to a location where a supersonic plasma plume atomizes the molten stream. The plasma source includes at least two plasma torches provided with at least one supersonic nozzle aimed towards the molten stream. The multiple plasma torches are disposed symmetrically about the location where the supersonic plasma plumes atomize the molten stream, such as in a ring-shaped configuration.

Abstract: The present application relates to a plasma atomization process and apparatus for producing metallic powders from at least one wire/rod feedstock. In the process, an electric arc is applied to the at least one wire/rod feedstock to melt the same. A plasma torch is employed to generate a supersonic plasma stream at an apex at which the electric arc is transferred to the at least one wire/rod feedstock to atomize the molten wire/rod feedstock into particles. A downstream cooling chamber solidifies the particles into the metallic powders. An anti-satellite diffuser is employed to prevent recirculation of the powders in order to avoid satellite formation. In an apparatus where two wires are fed, one wire serves as an anode, and the other as a cathode.

Abstract: An apparatus for producing metallic powders from molten feedstock includes a heating source for melting a solid feedstock into a molten feed, and a crucible for containing the molten feed. A liquid feed tube is also provided to feed the molten feed as a molten stream. A plasma source delivers a plasma stream, with the plasma stream being adapted to be accelerated to a supersonic N velocity and being adapted : to then impact the molten stream for producing metallic powders. The feed tube extends from the crucible to a location where a supersonic plasma plume atomizes the molten stream. The plasma source includes at least two plasma torches provided with at least one supersonic nozzle aimed towards the molten stream. The multiple plasma torches are disposed symmetrically about the location where the supersonic plasma plumes atomize the molten stream, such as in a ring-shaped configuration.

Abstract: The present application relates to a plasma atomization process and apparatus for producing metallic powders from at least one wire/rod feedstock. In the process, an electric arc is applied to the at least one wire/rod feedstock to melt the same. A plasma torch is employed to generate a supersonic plasma stream at an apex at which the electric arc is transferred to the at least one wire/rod feedstock to atomize the molten wire/rod feedstock into particles. A downstream cooling chamber solidifies the particles into the metallic powders. An anti-satellite diffuser is employed to prevent recirculation of the powders in order to avoid satellite formation. In an apparatus where two wires are fed, one wire serves as an anode, and the other as a cathode.

Abstract: An apparatus for producing metallic powders from molten feedstock includes a heating source for melting a solid feedstock into a molten feed, and a crucible for containing the molten feed. A liquid feed tube is also provided to feed the molten feed as a molten stream. A plasma source delivers a plasma stream, with the plasma stream being adapted to be accelerated to a supersonic N velocity and being adapted : to then impact the molten stream for producing metallic powders. The feed tube extends from the crucible to a location where a supersonic plasma plume atomizes the molten stream. The plasma source includes at least two plasma torches provided with at least one supersonic nozzle aimed towards the molten stream.

Abstract: A high temperature process is provided, which can melt, atomize and spheroidize a coarse angular powder into a fine and spherical one, it uses thermal plasma to melt the particle in a heating chamber and a supersonic nozzle to accelerate the stream and break up the particles into finer ones.

Abstract: A metal powder plasma atomization process and apparatus comprises at least one plasma torch, a confinement chamber, a nozzle positioned downstream of the confinement chamber and a diffuser positioned downstream of the nozzle. The nozzle accelerates liquid metal particles produced by the at least one plasma torch and also plasma gas to supersonic velocity such that the liquid metal particles are sheared into finer powders. The diffuser provides a Shockwave to the plasma gas to increase temperature of the plasma in order to avoid stalactite formation at an exit of the nozzle. The process increases both production rate of the metal powder and the yield of ?45 ?m metal powder.

Abstract: A system for accessing a trusted execution environment includes instructions to transmit, from a first trusted execution environment, a request for a biometric match claim, receive, in response to the request for a biometric match claim, biometric data from a biometric capture device, perform a match of the biometric data against biometric templates stored in the first trusted execution environment, and unseal a second trusted execution environment based on the match data.

Abstract: Examples are disclosed herein to implement remote authentication and passwordless password reset. An example server includes: at least one processor to forward executable instructions to a client device, the executable instructions, when executed at the client device, to cause the client device to: authenticate a user of an account based on a biometric authentication factor; obtain a local storage key by decrypting an encrypted local storage key with a cloud key obtained from a remote authentication server, the cloud key associated with the client device; decrypt a key bag with the local storage key, the key bag including a content encryption key and an encrypted credential encrypted with the content encryption key, the encrypted credential associated with the user; and decrypt the encrypted credential with the content encryption key to obtain a credential without the user supplying a master password associated with the account.

Abstract: A passwordless reset technique includes actions to receive a request for a password reset, wherein the request password reset is initiated at a first device, determine that the first device is a trusted device, authenticate the user in order to obtain a cloud key from a network device, wherein the cloud key is associated with the first device, derive a key encryption key using the cloud key, decrypt a local storage key using the key encryption key, decrypt a local storage using the local storage key to obtain a content encryption key, obtain a new password via user input, re-encrypt the content encryption key, and transmit it to the network device, derive a new authentication token using the new password, and transmit the new authentication token to the network device.

Abstract: A system for accessing a trusted execution environment includes instructions to transmit, from a first trusted execution environment, a request for a biometric match claim, receive, in response to the request for a biometric match claim, biometric data from a biometric capture device, perform a match of the biometric data against biometric templates stored in the first trusted execution environment, and unseal a second trusted execution environment based on the match data.

Abstract: A system for accessing a trusted execution environment includes instructions to transmit, from a first trusted execution environment, a request for a biometric match claim, receive, in response to the request for a biometric match claim, biometric data from a biometric capture device, perform a match of the biometric data against biometric templates stored in the first trusted execution environment, and unseal a second trusted execution environment based on the match data.

Abstract: The present disclosure relates to receiving a request for recovery of an account associated with a user, sending a CAPTCHA challenge to a user device associated with the user, receiving an answer to the CAPTCHA challenge and a confirmation code wrapped by an encryption key derived from a provisional master password, sending a notification of the request for recovery to one or more trusted entities associated with the user, and receiving a confirmation of the request from one or more of the trusted entities. The confirmation includes a recovery token associated with the particular trusted entity and an encrypted confirmation code.

Abstract: A system for accessing a trusted execution environment includes instructions to transmit, from a first trusted execution environment, a request for a biometric match claim, receive, in response to the request for a biometric match claim, biometric data from a biometric capture device, perform a match of the biometric data against biometric templates stored in the first trusted execution environment, and unseal a second trusted execution environment based on the match data.

Abstract: A passwordless reset technique includes actions to receive a request for a password reset, wherein the request password reset is initiated at a first device, determine that the first device is a trusted device, authenticate the user in order to obtain a cloud key from a network device, wherein the cloud key is associated with the first device, derive a key encryption key using the cloud key, decrypt a local storage key using the key encryption key, decrypt a local storage using the local storage key to obtain a content encryption key, obtain a new password via user input, re-encrypt the content encryption key, and transmit it to the network device, derive a new authentication token using the new password, and transmit the new authentication token to the network device.

Abstract: The present disclosure relates to receiving a request for recovery of an account associated with a user, sending a CAPTCHA challenge to a user device associated with the user, receiving an answer to the CAPTCHA challenge and a confirmation code wrapped by an encryption key derived from a provisional master password, sending a notification of the request for recovery to one or more trusted entities associated with the user, and receiving a confirmation of the request from one or more of the trusted entities. The confirmation includes a recovery token associated with the particular trusted entity and an encrypted confirmation code.