Search

In this paper, a FeCoNiCuTi high entropy alloy (HEA) was heat treated at 950 °C for different time durations. After heat treatment for different lengths of time, the FeCoNiCuTi HEA exhibited good thermal stability, and its crystal structure maintained its FCC + Laves phase structure. The magnetic and mechanical properties of the alloy were obviously improved, the saturation magnetization was increased by 33% to 51.7 emu·g−1, and the coercivity had no significant change. After heat treatment for 10 h, the maximum strain was 16.5%, which is approximately 5 times that of the as-cast alloy.

In view of problem of short transmission distance and high cost of existing point to point digital communications system, multi-channel digital audio communication system based on visible light transmission was designed and implemented by use of white LED. The system combines audio codec chip of TP3067 to implement multiplexing transmission of multi-channel audio signals, and uses FPGA as the main controller to control time slot of encoder signals. Experimental results show that the system can achieve transfer rate of up to 2.048 Mbit/s, and audio signal of up to 32-channels can be transmitted stably.