T/CMRS 003-2025 In-situ Powder-filled Tube Method for Magnesium Diboride Superconducting Round Wires

Scope

Scope: This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage, quality certificates, and order forms (or contracts) for MgB2 superconducting round wires manufactured by the in-situ powder-filling tube method. This standard applies to MgB2 superconducting round wires manufactured by the in-situ powder-filling tube method. Main technical contents: This standard specifies the phase composition, dimensional specifications, mechanical properties, appearance quality, superconducting transmission performance, test methods, and inspection rules for MgB2 superconducting wires. The main contents are as follows: 1. Phase composition: MgB2 content of 12-18%, Nb barrier layer content of 15-25%, Cu stabilizing material content of 25-35%, and Monel alloy cladding content of 35-45%; 2. Mechanical properties: - Tensile strength: Rm > 350 MPa; - Elongation control range: A ≥ 8%; 3. Superconducting transmission performance: The critical current density (Jc) of the wires > 1500 A/mm2 (4.2 K, 4 T). This standard also specifies the testing methods for mechanical properties and superconducting transmission performance, sampling locations and quantities, and the determination of inspection results.

Development Information

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