In some examples, a method for additively manufacturing a heat pipe, the method including depositing, via a filament delivery device, a filament to form a heat pipe preform, wherein the filament includes a binder and a metal or alloy powder; and sintering the heat pipe preform to form the heat pipe,
In some examples, a method for additively manufacturing a heat pipe, the method including depositing, via a filament delivery device, a filament to form a heat pipe preform, wherein the filament includes a binder and a metal or alloy powder; and sintering the heat pipe preform to form the heat pipe, the heat pipe including an outer shell, a wicking region, and a vapor transport region defined by the metal or alloy.
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1. A method for additively manufacturing a heat pipe, the method comprising: depositing, via a filament delivery device, a filament to form a heat pipe preform, wherein the filament includes a sacrificial binder and a metal or alloy powder; andsintering the heat pipe preform to form the heat pipe, t
1. A method for additively manufacturing a heat pipe, the method comprising: depositing, via a filament delivery device, a filament to form a heat pipe preform, wherein the filament includes a sacrificial binder and a metal or alloy powder; andsintering the heat pipe preform to form the heat pipe, the heat pipe including an outer shell, a wicking region, and a vapor transport region defined by the metal or alloy, andwherein the heat pipe is integrally formed with another component, wherein the other component is formed by depositing, via the filament delivery device, the filament to form a preform for the other component. 2. The method of claim 1, wherein the wicking region comprises a plurality of open lumens formed by the sintered metal or alloy powder extending from a hot end to a cold end of the heat pipe, and wherein each individual open lumen of the plurality lumens is defined by a cross-section of the deposited filament. 3. The method of claim 1, wherein a composition of the wicking region varies from a cold end to a hot end of the heat pipe. 4. The method of claim 1, wherein a porosity of the wicking region varies from a cold end to a hot end of the heat pipe. 5. The method of claim 1, wherein wicking region define a plurality of grooves extending from a cold end to a hot end of the heat pipe. 6. The method of claim 1, wherein the wicking region and outer shell define different porosities. 7. The method of claim 1, wherein the wicking region and outer shell have different compositions. 8. The method of claim 1, wherein an inner surface of the outer shell has a different composition than that of an outer surface of the outer shell. 9. The method of claim 1, further comprising depositing a working fluid within the outer shell. 10. The method of claim 1, wherein the wicking region defines a porosity greater than a porosity of the outer shell.
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