PRINTING A THREE-DIMENSIONAL PART TO ENHANCE SEPARATION AND SYSTEM AND METHODS THEREOF

1 . A method of forming a three-dimensional printed part in a printing system, comprising:

depositing a first print material onto a substrate or a partially formed three-dimensional metal part;

depositing a second print material comprising an oxidizing agent onto the partially formed three-dimensional part; and

forming an oxidized layer on a top surface of the partially formed three-dimensional part.

2 . The method of claim 1 , further comprising separating a first portion of the three-dimensional part from a second portion of the three-dimensional part.

3 . The method of claim 2 , wherein the first portion comprises a support layer.

4 . The method of claim 2 , wherein the first portion comprises a completed three-dimensional part.

5 . The method of claim 1 , further comprising exposing the partially formed three-dimensional metal part to an elevated temperature to oxidize the second print material.

6 . The method of claim 1 , further comprising exposing the partially formed three-dimensional metal part to a reducing agent to oxidize the second print material.

7 . The method of claim 6 , wherein the first print material comprises the reducing agent.

8 . The method of claim 1 , further comprising depositing the first printing material onto the oxidized layer on the top surface of the partially formed three-dimensional part after forming the oxidized layer on a top surface of the partially formed three-dimensional part.

9 . The method of claim 1 , wherein the oxidizing agent comprises a hypochlorite, a chlorite, a chlorate, a perchlorate, or a combination thereof.

10 . The method of claim 1 , wherein the oxidizing agent comprises a hexavalent chromium compound.

11 . The method of claim 1 , wherein the oxidizing agent comprises a permanganate.

12 . The method of claim 1 , wherein the first print material comprises aluminum.

13 . A method of forming a separation layer for a three-dimensional printed part in a printing system, comprising:

depositing an oxidizing print material onto a first portion of a three-dimensional part comprising a build material;

evaporating a volatile portion of the print material;

depositing build material onto the print material to form a second portion of the three-dimensional part; and

separating the first portion of the three-dimensional part from the second portion of the three-dimensional part.

14 . The method of claim 13 , wherein the oxidizing print material comprises a hypochlorite, a chlorite, a chlorate, a perchlorate, or a combination thereof.

15 . The method of claim 13 , wherein the oxidizing print material comprises a hexavalent chromium compound.

16 . The method of claim 13 , wherein the oxidizing print material comprises a permanganate.

17 . A printing system, comprising:

a first ejector for jetting a first print material, comprising:

a coil wrapped at least partially around the ejector; and

a power source configured to transmit voltage pulses to the coil and configured to supply one or more pulses of power to the coil, which causes one or more drops of the first printing material to be jetted out of the first ejector; and

a second ejector for jetting a second print material, wherein the second print material comprises an oxidizing agent.

18 . The printing system of claim 17 , wherein the second print material comprises hypochlorite, a chlorite, a chlorate, a perchlorate, a hexavalent chromium compound, a permanganate, or a combination thereof.

19 . The printing system of claim 17 , wherein the second ejector comprises a piezoelectric element configured to jet one or more drops of the second printing material from the second ejector.

20 . The printing system of claim 17 , wherein the second ejector comprises a solenoid element configured to jet one or more drops of the second printing material from the second ejector.

21 . The printing system of claim 17 , wherein the second ejector comprises a cooling element.