{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:55:40Z","timestamp":1791467740423,"version":"4.3.4"},"reference-count":30,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,20]],"date-time":"2021-12-20T00:00:00Z","timestamp":1639958400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["408904168"],"award-info":[{"award-number":["408904168"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["INST 212\/402-1 FUGG"],"award-info":[{"award-number":["INST 212\/402-1 FUGG"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002261","name":"Russian Foundation for Basic Research","doi-asserted-by":"publisher","award":["19-52-12030"],"award-info":[{"award-number":["19-52-12030"]}],"id":[{"id":"10.13039\/501100002261","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Alumina-based ceramic hip endoprosthesis heads have excellent tribological properties, such as low wear rates. However, stress peaks can occur at the point of contact with the prosthesis stem, increasing the probability of fracture. This risk should be minimized, especially for younger and active patients. Metal elevations at the stem taper after revision surgery without removal of a well-fixed stem are also known to increase the risk of fracture. A solution that also eliminates the need for an adapter sleeve could be a fixed titanium insert in the ceramic ball head, which would be suitable as a damping element to reduce the occurrence of stress peaks. A viable method for producing such a permanent titanium\u2013ceramic joint is brazing. Therefore, a brazing method was developed for coaxial samples, and two modifications were made to the ceramic surface to braze a joint that could withstand high cyclic loading. This cyclic loading was applied in multiple amplitude tests in a self-developed test setup, followed by fractographic studies. Computed tomography and microstructural analyses\u2014such as energy dispersive X-ray spectroscopy\u2014were also used to characterize the process\u2013structure\u2013property relationships. It was found that the cyclic loading capacity can be significantly increased by modification of the surface structure of the ceramic.<\/jats:p>","DOI":"10.3390\/ma14247895","type":"journal-article","created":{"date-parts":[[2021,12,21]],"date-time":"2021-12-21T04:23:47Z","timestamp":1640060627000},"page":"7895","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Microstructure and Defect-Based Fatigue Mechanism Evaluation of Brazed Coaxial Ti\/Al2O3 Joints for Enhanced Endoprosthesis Design"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8944-5003","authenticated-orcid":false,"given":"Johannes L.","family":"Otto","sequence":"first","affiliation":[{"name":"Chair of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivan","family":"Fedotov","sequence":"additional","affiliation":[{"name":"Department of Materials Science, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Milena","family":"Penyaz","sequence":"additional","affiliation":[{"name":"Department of Materials Science, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6585-8206","authenticated-orcid":false,"given":"Thorge","family":"Schaum","sequence":"additional","affiliation":[{"name":"Chair of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anke","family":"Kalenborn","sequence":"additional","affiliation":[{"name":"Chair of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Boris","family":"Kalin","sequence":"additional","affiliation":[{"name":"Department of Materials Science, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleg","family":"Sevryukov","sequence":"additional","affiliation":[{"name":"Department of Materials Science, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2287-2099","authenticated-orcid":false,"given":"Frank","family":"Walther","sequence":"additional","affiliation":[{"name":"Chair of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Merola, M., and Affatato, S. 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