Ceramic Dots Process
A method to fuse ceramic to a metallic substrate is provided. The method includes dispensing a ceramic material onto the metallic substrate and firing of the ceramic material to the metallic substrate at a predetermined temperature. The firing of the ceramic material promotes adhesion between the ceramic material and the metallic substrate.
1 . A method to fuse ceramic to a metallic substrate, the method comprising:
dispensing a ceramic material onto the metallic substrate; and
firing of the ceramic material to the metallic substrate at a temperature that promotes adhesion between the ceramic material and the metallic substrate.
2 . The method of claim 1 , wherein the metallic substrate is a stainless steel alloy.
3 . The method of claim 2 , wherein the peak firing temperature is between 800 degrees Celsius and 1100 degrees Celsius.
4 . The method of claim 2 , wherein the peak firing temperature is 965 degrees Celsius.
5 . The method of claim 1 , wherein the firing of the ceramic material is conducted in an inert atmosphere.
6 . The method of claim 5 , wherein the inert atmosphere includes Argon.
7 . The method of claim 5 , wherein the inert atmosphere includes Nitrogen.
8 . The method of claim 1 , wherein firing of the ceramic material is conducted in a reducing atmosphere.
9 . The method of claim 8 , wherein the reducing atmosphere includes ammonia.
10 . The method of claim 8 , wherein the reducing atmosphere includes an active reducing agent that causes a depletion of oxygen.
11 . The method of claim 8 , where the reducing atmosphere includes forming gas.
12 . The method of claim 8 , wherein the reducing atmosphere includes hydrogen.
13 . The method of claim 8 , wherein the reducing atmosphere includes a mixture of gases including hydrogen and one or more noble gases.
14 . The method of claim 1 , wherein the metallic substrate is a stainless steel substrate, and cooling the stainless steel substrate to a negative 73 degrees Celsius and heating the stainless steel substrate to 510 degrees Celsius.
15 . The method of claim 1 , wherein the ceramic material includes ceramic paste material.
16 . The method of claim 1 , wherein dispensing the ceramic material includes using a jet dispensing process that dispenses the ceramic material in a pattern of ceramic dots.
17 . The method of claim 16 , wherein the jet dispensing process enables customization of size and height of each of the ceramic dots.
18 . The method of claim 1 , wherein dispensing the ceramic material includes using a time and pressure needle dispensing process that dispense the ceramic material in a pattern of ceramic dots.
19 . The method of claim 18 , wherein the time and pressure needle dispensing process provides a metered amount of material dispensed by controlling time and pressure.
20 . The method of claim 19 , wherein the time and pressure needle dispensing process includes positioning a needle over each ceramic dot for a prescribed time period to allow for a consistent tail break.