Improving Electrical Contacts with Molybdenum-Rhenium Alloys

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The reliability of electrical contacts is critical in various industries, from aerospace to electronics. To enhance the performance and longevity of electrical contacts, materials with exceptional properties are required. Molybdenum-Rhenium (Mo-Re) alloys have emerged as a game-changing solution due to their unique combination of attributes. In this article, we delve into the role of Mo-Re alloys in improving electrical contacts and discuss their key properties and applications.

Molybdenum-Rhenium Alloy Wires

The Advantages of Molybdenum-Rhenium Alloys:

Molybdenum-Rhenium alloys are a class of advanced materials that unite the remarkable properties of molybdenum and rhenium. Molybdenum, known for its high-temperature strength and durability, combines with rhenium, renowned for its ductility and formability. This unique fusion results in alloys that offer an exceptional blend of mechanical resilience, ductility, and resistance to high temperatures.

The addition of rhenium to molybdenum is often in compositions like 47.5% rhenium or 41% rhenium. Such a combination significantly enhances the ductility, weldability, and formability of molybdenum. Thus, these alloys maintain their ductile qualities and become well-suited for applications in extreme conditions.

Key Properties of Mo-Re Alloys for Electrical Contacts:

Mo-Re alloys exhibit enhanced characteristics that make them highly desirable for electrical contact applications. Here are some notable examples.

  1. High Melting Point: The melting point of pure Molybdenum is already impressive, but the addition of Rhenium elevates it even further. This property ensures that Mo-Re alloys can withstand extreme temperatures without deforming or degrading.
  2. Excellent Conductivity: Mo-Re alloys maintain excellent electrical conductivity. This feature allows for efficient transmission of electrical currents.
  3. Resistance to Arc Erosion: In high-voltage electrical contacts, arc erosion can be a concern. Mo-Re alloys offer superior resistance to arc erosion to prolong the contacts’ life.
  4. Ductility: The ductile nature of Mo-Re alloys allows for the production of intricate contact shapes and ensures easy fabrication and assembly.

Applications of Mo-Re Alloys in Electrical Contacts:

Molybdenum-Rhenium alloys become an invaluable choice for electrical contacts in a variety of applications thanks to their unique combination of properties.

  1. Aerospace and Defense: Mo-Re alloys are used in electrical contacts for aerospace and defense applications. They are avionics, radar systems, and missile guidance systems. Their high-temperature performance and resistance to arc erosion are crucial in these demanding environments.
  2. Electronics and Telecommunications: These alloys find application in electrical connectors and relay contacts. So, they have reliable performance in communication devices and electronic equipment.
  3. Power Generation: Electrical contacts in power generation equipment benefit from Mo-Re alloys, because they maintain electrical conductivity under high-temperature and high-voltage conditions.
  4. Medical Devices: Mo-Re alloys are used in medical equipment, such as defibrillators and imaging systems.

Related reading: Applications Of Molybdenum Rhenium Alloys


Molybdenum-Rhenium alloys play a pivotal role in improving the reliability of electrical contacts across a wide range of industries. Their exceptional properties include high melting points, excellent conductivity, and resistance to arc erosion. These features make them an ideal choice for demanding applications in aerospace, electronics, power generation, and healthcare. As the quest for more reliable and efficient electrical contacts continues, Mo-Re alloys remain at the forefront of advanced material solutions.

At Advanced Refractory Metals (ARM), we take pride in offering top-quality Molybdenum-Rhenium alloys, and we specialize in creating custom shapes based on your specific requirements and designs. Please check our homepage for more information.

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