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
Harder 3D-printed tools – Researchers from Dresden introduce new process for hardmetal industry
11.10.2018 | Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Flying High with VCSEL Heating
04.10.2018 | Fraunhofer-Institut für Lasertechnik ILT
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly
The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
14.11.2018 | Materials Sciences
14.11.2018 | Health and Medicine
14.11.2018 | Life Sciences