K.Saksl : Najnovšie trendy vo vývoji hydridových zliatin kovov pre efektívne uskladnenie vodíka.

Abstract

In this presentation, we focused on the experimental validation of the semi-empirical concept of Griessen and Driessen, which determines the affinity of solid solutions to hydrogen, with its direct impact on the ability to absorb hydrogen in interstitial sites of single-phase high-entropy alloys. This work highlights the significance of this model in tailoring alloys for specific applications, such as maximizing hydrogen storage or minimizing hydrogen absorption in materials susceptible to hydrogen embrittlement. In the second half of the talk, the application of Barkhausen noise sensing for monitoring material changes due to hydrogen absorption will be discussed.

Biodegradable Alloys:

Recent advancements in materials science have also led to the development of biodegradable alloys. While primarily researched for biomedical and environmental applications, these alloys offer unique advantages in terms of their sustainable lifecycle and reduced ecological footprint. When integrated into hydrogen-related technologies, biodegradable alloys can present an environmentally friendly alternative for temporary or disposable components within hydrogen storage and transport systems. Their interactions with hydrogen, although less studied than traditional high-entropy or metallic alloys, can be of interest for specific scenarios where material degradation over time is acceptable or even desirable, such as in certain single-use or sacrificial components in hydrogen infrastructure. This addition broadens the scope of material choices and encourages a lifecycle approach that considers not only performance but also end-of-life impacts.

Barkhausen Noise Sensing as Non-Destructive Testing (NDT):

Barkhausen noise sensing is a non-destructive testing technique used to evaluate microstructural changes in ferromagnetic materials. It is particularly useful for monitoring the effects of hydrogen absorption, which can significantly alter a material’s mechanical properties and structural integrity. The presentation will cover the following applications:

*   Pipeline Monitoring: Hydrogen is commonly present in pipelines transporting natural gas or hydrogen gas. Barkhausen noise sensing can detect hydrogen-induced microstructural changes to prevent failures.

*   Hydrogen Storage Systems: As hydrogen becomes a more prominent energy carrier, monitoring storage tanks and pressure vessels for hydrogen-related degradation is critical.

*   Automotive and Aerospace Materials: Advanced steels and alloys used in these industries are often exposed to hydrogen environments, where Barkhausen noise can help ensure material reliability.

By incorporating biodegradable alloys into the discussion, the presentation acknowledges a broader spectrum of material options, highlighting not only the performance in hydrogen environments but also the potential for sustainable design in the future development of hydrogen technologies.