For the working places where have the risk of burningexplosion, non-sparking tools are important safety tools. They are made of hardest Cu-Be alloys. However, Be is very expensivepoisonous. To overcome this, we develop Be-free copper alloys which have high hardness for tools. In Taiwan, we have steel-tools industry. To have higher profit, it is promising to produce such Be-free non-sparking tools.

High entropy materials were proposed and developed by Professor Jien-Wei Yeh in 1995. He named, defined, and elucidated “High-Entropy Alloys,” as well as established High-Entropy Materials Center to develop critical materials for smart machine, green technology, biomedical technology, and national defense. Alloys with high strength, corrosion resistance, and anti-bacterial capability are also developed for manufacturing knives, door handles, handrails, etc. to prevent infection during the post-epidemic era.