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Company News About Si₃N₄ Ceramic Substrates Exceed 800 MPa Flexural Strength, Cutting Rail Traction Module Fracture Risk by 70%
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Si₃N₄ Ceramic Substrates Exceed 800 MPa Flexural Strength, Cutting Rail Traction Module Fracture Risk by 70%

2022-01-03
Latest company news about Si₃N₄ Ceramic Substrates Exceed 800 MPa Flexural Strength, Cutting Rail Traction Module Fracture Risk by 70%

In rail traction systems, power modules operate under intense vibration, frequent start–stop cycles and repeated thermal shocks. Conventional substrates tend to develop microcracks or even fracture, becoming a weak link for overall system reliability.

Silicon nitride (Si₃N₄) ceramic substrates now demonstrate flexural strength above 800 MPa—roughly twice that of typical AlN substrates. In combined vibration and thermal shock tests simulating high-speed rail traction conditions, module substrate fracture risk was reduced by about 70% compared with legacy solutions.

For rolling stock OEMs and system integrators, this means that by simply upgrading the substrate material—without changing circuit topology or package size—they can extend maintenance intervals, reduce failure rates and improve system availability, especially on high-capacity mainlines and intercity routes with tight maintenance windows.

Whenever an application involves strong vibration, mechanical shock or frequent cold starts, Si₃N₄ should be a priority substrate candidate rather than selecting solely on thermal conductivity.

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