The use of construction waste for concrete is an effective way to reduce the environmental burden while improving sustainability materials. Nano-SiO2 (NS) has excellent volcanic ash activity, which can effectively improve strength concrete. In this study, synergistic effects NS and 30% recycled aggregate (RCA) on mass loss, compressive strength, ultrasonic sound velocity values microstructure R...

In the oil and gas drilling industry, cemented carbide teeth are one of most widely used rock-breaking elements. order to reveal rock damage mechanism tooth indentation, a series indentation experiments were conducted in this study, an simulation was also as supplement experiment. experiment, new method observe inner status put forward, i.e., utilizing splitting action avoid unexpected that may...

GaAs is an important material for preparing power supply space vehicles, satellites, and systems. To study the displacement damage of caused by protons in environment, this article, Monte Carlo software Geant4 was used to simulate transport process GaAs; calculate non-ionizing energy loss (NIEL) with different energies; obtain species, range, proportion primary knock-on atom produced proton irr...

In this paper, the failure mode and mechanism of silicon carbide (SiC) Schottky barrier diode (SBD) irradiated by high-energy tantalum (Ta) ions are studied. The experimental results show that reverse bias voltage during irradiation is key factor causing SiC SBDs. When device 400 V, heavy will cause single event burnout (SEB), a “hole” formed melting material appears in device. 250–300 manifest...