Tungsten carbide is a well-known anti-wear material. For a long time, people have done a lot of research on tungsten carbide materials from practical applications, especially the research on its high-temperature tribological properties has achieved certain results. It is considered to be the most widely used. The development and application of the most promising metal-based composite materials have been used in aviation, aerospace, ordnance, automotive, agricultural machinery, electronics, sports and other industries.

The life activities of organisms are mainly carried out by cells, which are isolated from the surrounding environment through cell membranes and maintain a relatively stable internal environment. Cell membranes are mainly composed of lipids arranged into bilayer layers (BLM) and embedded with various functional proteins, which play the roles of material exchange, energy exchange and signal transmission between cells and the external environment.

The preparation method of the traditional cemented carbide is mainly to reduce the tungsten oxide by hydrogen to tungsten powder by using a fixed bed, a rotary furnace, a hydrogen plasma, etc., and the tungsten (W) powder and the carbon (C) powder are ball milled and mixed by high temperature carbonization. The tungsten carbide (WC) is ball-milled and mixed with the pre-formed cobalt powder to obtain a tungsten carbide-cobalt (WC-Co) cemented carbide mixed powder, and then the cemented carbide is prepared by press sintering.

The inspection of 235U abundance and homogeneity of nuclear fuel rods is a very important quality control link to ensure the safe and reliable operation of nuclear fuel rods in nuclear power plants. The purpose is to avoid the hot spots caused by uneven 235U enrichment at any location during the operation of nuclear fuel rods. These hot spots may cause fuel rod rupture, contaminate coolant and cause shutdown. Therefore, the enrichment and uniformity of 235U fuel rod must be checked by 100%.