Metal matrix composites (MMCs) have attracted more and more attention, and their reinforcements are generally particles, whiskers (or short fibers) and fibers. Metal matrix composites have higher specific strength, specific stiffness and high temperature strength than their matrix alloys. The preparation methods mainly include powder metallurgy sintering method and casting method (injection moulding).

White LED is a new solid-state lighting electric light source (SSL). Its principle and structure are different from those of previous vacuum electric light sources such as incandescent lamp and fluorescent lamp. SSL light source has many advantages, especially high light efficiency, energy saving, long life and pollution-free. Its application value and prospects are very promising. It has attracted the attention of many governments, scientific and technological circles and industrial circles, formulated development plans and injected heavy funds into development.

At present, rolling assisted biaxial texture technology (RABiTS) is one of the main methods for fabricating textured metal substrates for high temperature coated superconductors.

Superhard tungsten steel piercing needle refers to the wear-resistant tungsten steel products made of rare metal TiC and TaC which can significantly improve the high-temperature strength, high-temperature hardness and oxidation resistance of tungsten steel alloys. This kind of superhard material can keep almost unchanged at 600 ~℃, and still has a high hardness at 1100 ~℃, which is more than 10 times higher than that of ordinary tungsten steel matrix. It has great prospects to make wear-resistant, heat-resistant and efficient perforating needles of superhard tungsten steel with this material. The preparation process of superhard tungsten steel perforating needle includes: