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A simple way to make tough diamond/metal laminates

Xuan, Yang ; Fromm, Timo ; Bruns, Sebastian ; Borchardt, Rudolf ; Durst, Karsten ; Rosiwal, Stefan M. (2024)
A simple way to make tough diamond/metal laminates.
In: Journal of the European Ceramic Society, 2021, 41 (10)
doi: 10.26083/tuprints-00026604
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: A simple way to make tough diamond/metal laminates
Language: English
Date: 10 September 2024
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Amsterdam [u.a.]
Publisher: Elsevier
Journal or Publication Title: Journal of the European Ceramic Society
Volume of the journal: 41
Issue Number: 10
Collation: 9 Seiten
DOI: 10.26083/tuprints-00026604
Corresponding Links:
Origin: Secondary publication service
Abstract:

Diamond foils are exceptionally strong yet brittle. One approach to make ceramic foils less susceptible to brittle fracture is to introduce interfaces into the material that provide pathways for crack deflection. In this study, we were able to produce strong yet tough diamond/metal laminates (DMLs) from freestanding diamond foils using a brazing process. The mechanical behavior was characterized via three-point bending (3PB) where the laminates exhibit step-like fracture. Crack deflection at interfaces induces toughening within the laminates. At approx. 3.0 MJ/m3 diamond/metal laminates exhibit more than twice the fracture energy of monolithic diamond foils while maintaining 90 % stiffness and about 70 % nominal strength. Classical laminate theory (CLT) supports the assessment of the deformation behavior and step-like fracture of diamond/metal laminates. We find that the diamond-to-metal interface plays a critical role: it must be strong enough to enable the transfer of shear stress, while being weak enough to deflect a crack.

Uncontrolled Keywords: Diamond foil, Ceramic laminate, Chemical vapor deposition (CVD), Mechanical behavior, Analytical modeling
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-266043
Additional Information:

This work was supported by the German Research Foundation (DFG) [grant number 386182271].

Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 10 Sep 2024 07:52
Last Modified: 10 Sep 2024 07:53
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26604
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