The influence of target film material and coating on neutron yield and sputtering yield

Abstract

The long-life, high yield deuterium-deuterium (D-D) neutron tube has become one of the research hotspots. Here, deuterated polyethylene target, heavy water target and titanium target were investigated by Stopping and Range of Ions in Matter (SRIM). The calculation showed that the deuterated polyethylene target, which was a potential target material, had the highest yield at an incident energy of 120 keV. Further, considering the unfavorable factors such as impurity ions and high temperature, the coating was used to protect the target material. Diamond, boron carbide, boron nitride, silicon carbide, and aluminum carbide were selected. The simulation results showed that the diamond composite deuterated polyethylene film had the best sputtering resistance, and the aluminum nitride composite heavy water target film had the lowest sputtering yield. The two coating materials shield the target, reduced the energy loss of incident ions, and provided a new method for the research of high yield and long life neutron tube.

Effect of temperature on the tribological properties of Polytetrafluoroethylene/Kevlar fabric/phenolic composites

“…Fabric‐reinforced polymer composites are widely used in the mechanical engineering because of their light weight, chemical inertness, low coefficient of friction (COF), and excellent wear resistance properties. [ 1–5 ] Among the fabric composites, phenolic based Polytetrafluoroethylene (PTFE)/Kevlar fabric composite is the first choice for self‐lubricating spherical plain bearing. [ 6,7 ] Phenolic resins have high mechanical strength, dimensional stability and resistance of solvents, while PTFE and Kevlar fibers have good lubrication and wear resistance so that the fabric composite shows excellent tribological properties in application.…”