Method for treating a surface of a timepiece component, and timepiece component obtained from such a method
AssigneeRolex SA
InventorSusana del Carmen Tobenas Borron
Life of this patent
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Abstract
A method for treating a surface (2) of a base (1) of a timepiece component (10), in particular a balance spring, e.g. a balance spring made of a paramagnetic NbZr alloy, includes: a first step of depositing a first layer (41) of a first oxide or first nitride or first carbide; and a second step of depositing a second layer (51) of a second oxide or second nitride or second carbide.
Claims15
A process for treating a Nb—Zr alloy surface of a base of a timepiece component which is an oscillator component, the process comprising:
- a first step of depositing by atomic deposition a first layer of a first material which is Al2O3;
- and
- a second step of depositing by atomic deposition on the first layer a second layer of a second material which is TiO2,
- wherein a combination of the first layer and second layer has a negative thermoelastic coefficient.
A timepiece component which is an oscillator component having a treated surface obtained by performing a process for treating a Nb—Zr alloy surface of a base of the timepiece component, the process comprising:
- a first step of depositing by atomic deposition a first layer of a first material which is Al2O3;
- and
- a second step of depositing by atomic deposition on the first layer a second layer of a second material which is TiO2,
- wherein a combination of the first layer and second layer has a negative thermoelastic coefficient.
A timepiece component which is an oscillator component comprising a base and a coating on a Nb—Zr alloy surface of the base, the coating including:
- a first layer deposited by atomic deposition of a first material which is Al2O3;
- and
- on the first layer, a second layer deposited by atomic deposition of a second material which is TiO2,
- wherein a combination of the first layer and second layer has a negative thermoelastic coefficient.
Dependencies are inferred from the claim text.