Patent SG-11201903682W-A (SG)
Title: Nondestructive inspection method for coatings and ceramic matrix composites
Inventor: BAUCKE RUSSELL CRAIG
IPC: G01N27/02
Filed: 2017-10-27
Abstract: 1 N 71- 1-1 00 1-1 O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 03 May 2018 (03.05.2018) WIP0 I PCT onion °nolo omm om ioo Ho Imo oimIE (10) International Publication Number WO 2018/081647 Al (51) International Patent Classification: G01N 27/02 (2006.01) GO1N 29/34 (2006.01) (21) International Application Number: PCT/US2017/058879 (22) International Filing Date: 27 October 2017 (27.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 15/335,822 27 October 2016 (27.10.2016) US (71) Applicant: GENERAL ELECTRIC COMPANY [US/US]; 1 River Road, Schenectady, NY 12345 (US). (72) Inventors: BAUCKE, Russell Craig; M/D G104, 1 Neumann Way, Cincinnati, OH 45215 (US) HILDER- BRAND, Glen David; One Neumann Way, Cincinnati, OH 45215 (US). DECKER, Timothy Francis; One Neumann Way, Cincinnati, OH 45215 (US). CROWGEY, Benjamin Reid; 1 Neumann Way, Evendale, OH 45215-1988 (US). (74) Agent: ANDES, William Scott et al.; General Electric Company, Global Patent Operation, 901 Main Avenue, 3rd Floor, Norwalk, CT 06851 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.1700) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4 . 1 7 (iii)) Published: — with international search report (Art. 21(3)) (54) Title: NONDESTRUCTIVE INSPECTION METHOD FOR COATINGS AND CERAMIC MATRIX COMPOSITES 10 HOT GAS 12 ---- TBC CMC COMPOSITE 22 (57) : A method for nondestructive inspection of ceramic structures present as either a ceramic matrix composite structure or a ceramic based coating. Such non-metallic structures are used to provide thermal protection or weight reduction or both to aircraft and their components. The nonmetallic structure is scanned with an electromagnetic pulse in the range of 200 GHz to 4 THz. The electromagnetic pulse includes a plurality of frequencies within the Terahertz range and is not restricted to a single designated frequency. The frequency range is sensitive to changes in impedances and refractive index within the structure. After the electromagnetic pulse passes through the nonmetallic structure, it may be evaluated for changes in impedance in the nonmetallic structure at different locations, and, when present, whether the changes in impedance impact the ability of the structure to perform the function for which it was designed.