Rotary anode for an X-ray source

A rotary anode X-ray tube, comprising:

• an evacuated envelope;
• a rotatable anode comprising:
• a substrate;
• and
• a target region formed on the substrate, wherein the target region comprises a multi-layer coating comprising a first layer of a first material deposited on a surface of the substrate, and a second layer of a second material deposited on the surface of the first layer, wherein the total thickness of the first layer and the second layer is between approximately 5 μm to 60 μm, wherein a thickness ratio between the first and second layers of the multi-layer coating in the target region is between approximately 0.5 to 2.0, and wherein the first material has a greater modulus of resilience compared to the second material, and the second material is more thermally conductive compared to the first material;
• and
• a cathode contained within the evacuated envelope, oriented to accelerate electrons towards the rotatable anode to cause X-ray emission.

A method of manufacturing a rotatable anode, comprising:

• providing a rotatable anode substrate;
• depositing a first layer of a first material onto a surface of the substrate;
• and
• depositing a second layer of a second material on the surface of the first layer, wherein the total thickness of the first layer and the second layer is between approximately 5 μm to 60;
• μm;
• wherein a thickness ratio between the first and second layers in a target region is between approximately 0.5 to 2.0;
• and
• wherein the first material has a greater modulus of resilience compared to the second material, and wherein the second material is more thermally conductive compared to the first material.