Molybdenum-rhenium alloys are a group of specialr metals that have many uses, especially in aerospace and similar industries. They have unique low-temperature strength characteristics and are frequently used in components that need to withstand extreme temperatures. The chemistry of these materials is subject to demand and can take on various forms, allowing them to be tailored to specific applications.
Molybdenum is primarily used as an alloying agent, while rhenium functions as a strengthening agent in molybdenum alloys. The interaction between the two creates a variety of properties that make the alloys a desirable choice for many applications. Their strength, ductility, and workability make them capable of complex shapes and sizes.
Molybdenum-rhenium alloys usually contain from 2 to 6 % rhenium. Classic alloys, such as TZM (Tungsten-Zirconium-Molybdenum) and WZ8 (Tungsten-Zirconium- Molybdenum) offer a balance between strength and ductility. Their low thermal coefficients make them excellent for high temperature applications. Higher levels of rhenium in these alloys give them even greater strength and hardness, making them ideal for extremely demanding, high temperature applications such as engine parts and exhaust systems.
The introduction of rhenium into alloys with molybdenum increases its mechanical strength, allowing them to reach higher temperatures with greater resistance. In creating molybdenum-rhenium alloys, the base molybdenum can be refined or replaced altogether to create an alloy that is particularly suited to a particular application. Depending on the desired end product, various combinations of molybdenum-rhenium alloys can be used. These alloys can also include other elements such as tungsten, tantalum and hafnium, increasing their resistance even more.
Molybdenum-rhenium alloys are also resistant to corrosion, making them suitable for highly corrosive atmospheres. The anti-corrosive properties of rhenium provide further protection for the metal when exposed to certain corrosive agents. This is ideal for components that require greater levels of protection.
The Molybdenum-Rhenium alloys used in the aircraft and aerospace industry are usually covered with a protective coating. This is usually done through the use of back-pumping, a technique that prevents oxidation and erosion. This coating also helps protect against environmental factors.
Molybdenum-rhenium alloys offer a range of benefits to industrial and aerospace applications. The combination of molybdenum and rhenium provides a variety of properties that make them ideal for parts that require extra strength and performance. Combined with the protective coating, molybdenum-rhenium alloys ensure maximum protection for any part operating in extreme temperatures and conditions.
