Abstract : Molybdenum exhibits many advantages in semiconductor industry．Summarized the physicochemical properties， preparation processes，and application directions of three kinds of molybdenum precursors (molybdenum hexafluoride，mo- lybdenum dichloride dioxide，and molybdenum hexacarbonyl).1 IntroductionElemental molybdenum possesses numerous advantages, including a high melting point, low therma

  Abstract : To address the high cost issue of adding nickel to 40CrNiMo steel while maintaining its good hardenability , a technical solution was proposed to reduce nickel content through vanadium (V) microalloying , aiming to achieve cost control while maintaining excellent hardenability. The original austenite grains and microstructure of the experimental steels were characterized using

  Abstract：The properties of surface and internal materials after acid pickling of tantalum powder were com_ pared and analyzed, especially the changes of properties, chemical properties and electrical properties between tantalum powder surface and normal materials after acid pickling. The results show that the bulk density and Fischer particle size of the surface materials are larg

  Abstract: To address the issue of heat distribution during the 3D printing of titanium alloy wire, this paper proposes a synergistic optimization mechanism for Joule heating and melting heat. Based on an ANSYS transient thermodynamic model, the study systematically analyzes the evolution of temperature fields under different laser powers (1–10 kW) and their effects on the corresponding stress-stra

  Tantalum-tungsten-based alloys inherit the excellent properties of pure tantalum and significantly enhance their mechanical properties through solid solution strengthening [1]. The solid solution of tungsten (W) atoms in the body-centered cubic (BCC) lattice of tantalum causes severe lattice distortion, greatly increasing the resistance to dislocation motion, thereby significantly improving the al

  1. IntroductionIn recent years, with the continuous advancement of 3D printing technology, the field of powder metallurgy has garnered increasing attention. It is well known that among all elements and compounds in nature, chromium (Cr) and its compounds rank among the hardest metallic materials. Characterized by excellent chemical stability, high-temperature resistance, and low friction coeffic

  1 IntroductionTi65 titanium alloy is a near-α high-temperature titanium alloy developed based on Ti60 titanium alloy [1]. It possesses excellent high-temperature strength, creep resistance, and corrosion resistance, maintaining stable performance under long-term service conditions at approximately 650°C. It is widely used in high-temperature components such as aircraft engine blades [2]. Nb521 nio

  ManufacturingAbstractAs an important branch of additive manufacturing, metal 3D printing technology has broad application prospects in manufacturing and many other industries due to its unique manufacturing method and remarkable advantages, providing an innovative solution for the fabrication of complex components. This paper first gives a basic introduction to metal 3D printing; then introduces t

  Preparation and Applications of Tungsten‑Rhenium AlloysSolid‑solution‑strengthened tungsten‑rhenium (W‑Re) alloys with a body‑centered cubic (BCC) structure, formed by the dissolution of rhenium in tungsten, exhibit a series of excellent properties, such as high melting point, high strength, high hardness, high ductility, high recrystallization temperature, high electrical resistivity, low vapor p

  Ti-6Al-4V (TC4), a stable (α+β) duplex titanium alloy [1], has gained extensive application in aerospace and biomedical fields [4] due to its excellent corrosion resistance and biocompatibility [2-3]. However, inherent limitations such as low hardness, poor wear resistance, and insufficient thermal conductivity [5-7] severely restrict its engineering applications. Particularly under complex operat

  Tantalum is a high-temperature refractory metal. Its smelting typically employs the following process: first reducing compounds to metallic powder, followed by purification, sintering, and property adjustment to produce tantalum powder meeting diverse application requirements. When tantalum powder is processed into bars, plates, foils, tubes, wires, and other tantalum products, it is commonly refe

  High-density tungsten alloys are a class of alloys with tungsten as the matrix, incorporating small amounts of transition elements such as nickel, iron, copper, cobalt, and chromium as binder phases [1-3]. Due to their high density, high melting point, high strength, and certain radiation shielding capabilities, they are currently widely used in military fields such as kinetic energy armor-piercin