Product Details
Tungsten copper (W-Cu) contacts are composite materials made by sintering tungsten particles within a copper matrix. Tungsten Copper Contacts are used in various electrical and electronic applications where a combination of high thermal and electrical conductivity, high mechanical strength, and resistance to wear and arc erosion are required.
Features of Tungsten Copper Contacts:
- High Thermal Conductivity: Copper's excellent thermal conductivity allows for effective heat dissipation from the contact area.
- High Electrical Conductivity: Copper also provides good electrical conductivity, which is essential for the efficient transmission of electrical current.
- High Strength and Wear Resistance: Tungsten particles within the copper matrix enhance the mechanical strength and wear resistance of the contacts.
- Arc Erosion Resistance: Tungsten copper contacts have good resistance to arc erosion, which is important for applications involving switching and arcing.
- Low Expansion: Tungsten has a low coefficient of thermal expansion, which helps to minimize the risk of tungsten copper contacts deformation due to temperature changes.
Applications of Tungsten Copper Contacts:
Electrical Switches and Relays: Tungsten copper contacts are commonly used in high-power switches, circuit breakers, and relays where reliable electrical conductivity and durability are required.
Arcing Contacts: In devices that involve arcing, such as in some types of electrical switches, tungsten copper contacts can withstand the erosive effects of arc discharge.
Thyristors and Transistors: Tungsten copper contacts are used in power electronics devices such as thyristors and transistors, where high current densities and heat dissipation are critical.
Fuses and Contactors: In fuses and contactors, tungsten copper contacts can handle high currents and provide reliable performance.
Motor Brushes: Tungsten copper is sometimes used in the manufacture of motor brushes, which are electrical contacts used to transfer current between stationary wires and moving parts of motors.
Specification of Tungsten copper contacts
|
Composition (Wt%) |
W90Cu10 |
W88Cu12 |
W85Cu15 |
W80Cu20 |
|
Density (g/cm3) |
17 |
16.6 |
16.4 |
15.5 |
|
Coefficient of Thermal Expansion(10-6/K) |
5.6 |
5.7 |
5.8 |
7 |
|
Thermal Conductivity (W/mK) |
180 |
188 |
196 |
220 |
|
Specific Heat Capacity (J/kgK) |
155 |
165 |
175 |
190 |
|
Young's Modulus (Gpa) |
325 |
315 |
305 |
278 |
|
Specific Electrical Resistance(uΩm) |
0.047 |
0.045 |
0.042 |
0.035 |
|
Vickers Hardness (HV10) |
300 |
295 |
275 |
255 |
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