In Fridays edition of Applied Physics, TU Delft researchers will publish an article on how coatings are made and why they so often let go. “Finally, after 30 years, we know exactly what happens,” says Dr. Guido Janssen, materials expert at TU Delft and first author of the article to be printed in the prestigious American journal. Together with his colleagues at the Netherlands Institute for Metals Research (NIMR), he has brought the coating of very small components one step closer.
Taps, valves in a diesel motor or electrical components, many objects are coated. These thin layers can provide a certain visual enhancements, such as a reflective surface. They can also protect the coated material from being damaged. Janssen: “The problem is that in some cases, these coatings start to detach from the base material. The tap becomes ugly and the diesel valve is damaged, causing the engine to run less efficiently.”
The delamination of coatings is caused by tension forces within in the coatings. The atoms in the coating exert ‘pulling’ forces on one another, thereby finally pulling each other off the base material. Janssen: “This is a large problem within the mechatronics (mechanics combined with electronics) field, where the thickness of the coating often accounts for 10% of the total material thickness. The same tension is responsible for causing electronic chips to warp, and is it one of the that make it difficult to continuously develop more complex chips.”
Maarten van der Sanden | alfa
NRL develops laser processing method to increase efficiency of optoelectronic devices
16.04.2019 | Naval Research Laboratory
Hollow structures in 3D
29.03.2019 | Albert-Ludwigs-Universität Freiburg im Breisgau
Researchers led by Francesca Ferlaino from the University of Innsbruck and the Austrian Academy of Sciences report in Physical Review X on the observation of supersolid behavior in dipolar quantum gases of erbium and dysprosium. In the dysprosium gas these properties are unprecedentedly long-lived. This sets the stage for future investigations into the nature of this exotic phase of matter.
Supersolidity is a paradoxical state where the matter is both crystallized and superfluid. Predicted 50 years ago, such a counter-intuitive phase, featuring...
A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter
A localization phenomenon boosts the accuracy of solving quantum many-body problems with quantum computers which are otherwise challenging for conventional computers. This brings such digital quantum simulation within reach on quantum devices available today.
Quantum computers promise to solve certain computational problems exponentially faster than any classical machine. “A particularly promising application is the...
The technology could revolutionize how information travels through data centers and artificial intelligence networks
Engineers at the University of California, Berkeley have built a new photonic switch that can control the direction of light passing through optical fibers...
Physicists observe how electron-hole pairs drift apart at ultrafast speed, but still remain strongly bound.
Modern electronics relies on ultrafast charge motion on ever shorter length scales. Physicists from Regensburg and Gothenburg have now succeeded in resolving a...
17.04.2019 | Event News
15.04.2019 | Event News
09.04.2019 | Event News
23.04.2019 | Information Technology
23.04.2019 | Earth Sciences
23.04.2019 | Life Sciences