# US 10,307,816 B2 · Additively manufactured core for use in casting an internal cooling circuit of a gas turbine engine component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,816 B2 - Document ID: US10307816B2 - Status: Granted - Kind: B2 - Application number: 14/922,273 - Filed: 2015-10-26 - Published: 2017-04-27 - Granted: 2019-06-04 - Earliest claimed: 2015-10-26 - Assignees: United Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Thomas N Slavens; James Tilsley Auxier - Web page: https://patentgrep.com/patent/US10307816B2 ## CPC - B22C 9/103: {Multipart cores} - B22D 23/06: Melting-down metal, e.g. metal particles, in the mould - B22D 27/045: {Directionally solidified castings} - B22F 5/007: {of moulds} - B22F 7/08: with one or more parts not made from powder {(B22F7/062 takes precedence)} - B33Y 10/00: Processes of additive manufacturing - B33Y 80/00: Products made by additive manufacturing - C30B 1/02: by thermal treatment, e.g. strain annealing (C30B1/12 takes precedence) - B22F 10/25: Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] - B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] - B22F 2999/00: Aspects linked to processes or compositions used in powder metallurgy - B28B 1/001: {Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00)} - B28B 7/346: {Manufacture of moulds} - Y02P 10/25: Process efficiency - B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - C30B: SINGLE-CRYSTAL GROWTH (by using ultra-high pressure, e.g. for the formation of diamonds, B01J3/06); UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL (zone-refining of metals or alloys C22B); PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (casting of metals, casting of other substances by the same processes or devices B22D; working of plastics B29; modifying the physical structure of metals or alloys C21D, C22F); SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (for producing semiconductor devices or parts thereof H10); APPARATUS THEREFOR - B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A core for use in casting an internal cooling circuit within a gas turbine engine component includes a base core portion and an additive core portion additively manufactured to the base core portion. A method of manufacturing a core for use in casting an internal cooling circuit within a gas turbine engine component including additively manufacturing an additive core portion to a base core portion. ## Claims ### Claim 1 A core for use in casting an internal cooling circuit within a gas turbine engine component, the core comprising: a base core portion manufactured of a first crushable material without at least one portion of the internal cooling circuit; and an additive core portion additively manufactured to the base core portion, the additive core portion comprising the at least one portion of the internal cooling circuit to form a complete internal cooling circuit, the additive core portion manufactured of a second crushable material, the second crushable material less crushable than the first crushable material. ### Claim 2 (depends on 1) The core as recited in claim 1, wherein the base core portion is manufactured of a ceramic material. ### Claim 3 (depends on 1) The core as recited in claim 1, wherein the base core portion is cast. ### Claim 4 (depends on 1) The core as recited in claim 1, wherein the additive core portion is additively manufactured of molybdenum. ### Claim 5 (depends on 1) The core as recited in claim 1, wherein the additive core portion forms a multiple of trailing edge crossovers. ### Claim 6 (depends on 1) The core as recited in claim 1, wherein the additive core portion is additively manufactured onto the base core portion. ### Claim 7 (depends on 6) The core as recited in claim 6, wherein the additive core portion includes a multiple of pin-shaped protrusions. ### Claim 8 (depends on 7) The core as recited in claim 7, wherein each of the multiple of pin-shaped protrusions are additively manufactured into a respective recess formed in the base core portion. ### Claim 9 (depends on 1) The core as recited in claim 1, wherein the base core portion is manufactured without trailing edge features. ### Claim 10 (depends on 1) The core as recited in claim 1, wherein the base core portion comprises a ceramic material and the additive core portion comprises molybdenum. ### Claim 11 A core for use in casting an internal cooling circuit within a gas turbine engine component, the core comprising: a base core portion manufactured of a first crushable material without a trailing edge and at least one portion of the internal cooling circuit; and an additive core portion additively manufactured to the base core portion, the additive core portion comprising the trailing edge and the at least one portion of the internal cooling circuit to form a complete internal cooling circuit, the additive core portion manufactured of a second crushable material, the second crushable material less crushable than the first crushable material. ### Claim 12 (depends on 11) The core as recited in claim 11, wherein the additive core portion includes a multiple of pin-shaped protrusions. ### Claim 13 (depends on 12) The core as recited in claim 12, wherein each of the multiple of pin-shaped protrusions are additively manufactured into a respective recess formed in the base core portion.