Physical properties of titanium hydride powder

Among metal elements, titanium has high specific strength. It is a high-strength but low-quality metal and has quite good ductility (especially in oxygen free environment). The surface of titanium is silvery white and metallic. Its melting point is quite high (more than 1649 ℃), so it is a good refractory metal material. It has paramagnetism, and its conductivity and thermal conductivity are very low.

Commercial grade titanium (99.2% purity) has an ultimate tensile strength of about 434 MPa, similar to low-grade steel alloys, but 45% lighter than steel alloys. The density of titanium is 60% higher than that of aluminum, but the strength is twice that of the common 6061-T6 aluminum alloy. Titanium can be used for various purposes. Some titanium alloys (e.g β C) The tensile strength is 1400 MPa. However, when titanium is heated to more than 430 degrees Celsius, the strength decreases.

Although not comparable to high-grade heat-treated steel, titanium still has considerable hardness. Titanium is not magnetic, and it is also a poor heat conduction and conductor. Attention should be paid to mechanical treatment, because if sharp tools and appropriate cooling methods are not used, titanium will soften and leave indentation. Like steel structures, titanium structures have fatigue limits, so they can be durable in some applications. The specific stiffness of titanium alloy is generally lower than that of aluminum alloy, carbon fiber and other materials, so it is less used in structures requiring high stiffness.

Titanium has two allotropic isomers, which will accumulate most densely from the hexagonal at 882 ℃ α Type into body centered cubic β Type. Before reaching the critical temperature, α The specific heat of type A will increase sharply with the temperature rise, but will decrease after reaching, and then β It is basically constant regardless of temperature. Similar to zirconium and hafnium, titanium has one ω It is thermodynamically stable at high pressure, but it may also exist in metastable state at atmospheric pressure. This state is generally hexagonal (ideal) or triangular (distorted), resulting in soft longitudinal wave acoustic photons β The collapse of type (111) atomic plane can be observed.