| 91. |
- Holzapfel, Damian M., et al.
(författare)
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Enhanced thermal stability of (Ti,Al)N coatings by oxygen incorporation
- 2021
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Ingår i: Acta Materialia. - : Elsevier. - 1359-6454 .- 1873-2453. ; 218
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Tidskriftsartikel (refereegranskat)abstract
- Thermal stability of protective coatings is one of the performance-defining properties for advanced cutting and forming applications as well as for energy conversion. To investigate the effect of oxygen incorporation on the high-temperature behavior of (Ti,Al)N, metastable cubic (Ti,Al)N and (Ti,Al)(OxN1-x) coatings are synthesized using reactive arc evaporation. X-ray diffraction of (Ti,Al)N and (Ti,Al)(OxN1-x) coatings reveals that spinodal decomposition is initiated at approximately 800 degrees C, while the subsequent formation of wurtzite solid solution is clearly delayed from 1000 degrees C to 1300 degrees C for (Ti,Al)(OxN1-x) compared to (Ti,Al)N. This thermal stability enhancement can be rationalized based on calculated vacancy formation energies in combination with spatially-resolved composition analysis and calorimetric data: Energy dispersive X-ray spectroscopy and atom probe tomography data indicate a lower O solubility in wurtzite solid solution compared to cubic (Ti,Al)(O,N). Hence, it is evident that for the growth of the wurtzite, AlN-rich phase in (Ti,Al)N, only mobility of Ti and Al is required, while for (Ti,Al)(O,N), in addition to mobile metal atoms, also non-metal mobility is required. Prerequisite for mobility on the non-metal sublattice is the formation of non-metal vacancies which require larger temperatures than for the metal sublattice due to significantly larger magnitudes of formation energies for the non-metal vacancies compared to the metal vacancies. This notion is consistent with calorimetry data which indicate that the combined energy necessary to form and grow the wurtzite phase is larger by a factor of approximately two in (Ti,Al)(O,N) than in (Ti,Al)N, causing the here reported thermal stability increase. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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| 97. |
- Kwon, J. Y., et al.
(författare)
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Seeing the person before the numbers: Personas for understanding patients? life stories when using patient-reported outcome measures in practice settings
- 2023
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Ingår i: International Journal of Medical Informatics. - : Elsevier BV. - 1386-5056. ; 172
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Tidskriftsartikel (refereegranskat)abstract
- Aims: While patient-reported outcome measures (PROMs) are increasingly being integrated into health infor-mation technologies, one challenge has been to assist clinicians in understanding how the responses to PROMs relate to patient stories for identifying and addressing the care needs of individual patients. Personas, hypo-thetical representations of patients, can be used as an innovative strategy to support clinicians' use of PROMs in their practice. These personas embody patients' life stories, making them a valuable tool for understanding the person when using PROMs. The aim of this project focused on cancer-related experiences to develop personas as a knowledge translation strategy to support clinicians' use of PROMs for person-centred cancer care. Methods: Eight older adults participated in online workshops (n = 2-3 participants/workshop; 1.5-hour sessions) to co-develop personas that reflected their collective experiences at a particular stage of their cancer journeys. Participants were asked to identify themes that focused on what the personas were thinking and feeling, what influenced how the personas acted, and the personas' overall goals. Participants subsequently completed an emotional well-being PROM from the perspective of the persona. Personas were further refined based on key themes identified during the workshop discussions. Results: Four personas representing the cumulative experiences of the workshop participants were developed to help clinicians link PROM responses to patient stories. These personas became the basis of four practice sce-narios, which were examples of interactions between a clinician and each persona, to demonstrate the use of PROMs in practice. Conclusion: Personas can be used to illustrate patients' life stories and contextualize PROMs data. As a knowledge translation strategy, personas can foster clinician awareness of how responses to PROMs can be used to initiate conversations to better understand patients' unique life situations.
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