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    AML magnet materials: supply-chain and design implications for engineers

    February 6, 2026|

    Reviewed by Joe Ashwell

    AML magnet materials: supply-chain and design implications for engineers

    First reported on MINING.com

    30 Second Briefing

    Advanced Magnet Lab (AML) is scaling a wire-like manufacturing process for permanent magnets, enabling samarium nitride and manganese-bismuth compositions that are poorly suited to conventional press-and-sinter NdFeB routes dominated by China. Operating at pilot scale and targeting roughly 100 tonnes per year rather than 10,000-tonne megaprojects, AML is qualifying MnBi magnets with motor OEMs and ramping NdFeB output for defence and specialty uses, with samarium nitride furthest advanced. OEMs are reportedly paying US$10–20/kg premiums for diversified, traceable supply, while magnet-making equipment faces 14–20 month lead times.

    Technical Brief

    • AML’s process mimics continuous superconducting wire production rather than batch press-and-sinter of compacted powders.
    • Traditional sintered magnet plants see 60–70% of finished magnet cost tied directly to raw materials.
    • Capital intensity and entrenched IP around sintered NdFeB lines are cited as key barriers to new entrants.
    • AML’s early patent filings (circa 2015–2016) pre-dated US–China trade tensions and reshoring incentive schemes.

    Our Take

    With raw materials like neodymium and other rare earths accounting for 60–70% of NdFeB magnet pricing, AML’s focus on alternative chemistries such as samarium nitride or manganese-bismuth directly targets the cost structure rather than just incremental process efficiency.

    The 14–20 month lead times for magnet-making equipment mean any new USA- or EU-based capacity responding to critical minerals policy will lag OEM demand into the early 2026 horizon, so AML’s 100 t/y target looks more like a near-term niche supply play than a full substitute for Chinese volumes.

    Our Materials coverage has only a limited number of boron- and critical-minerals-tagged pieces that deal with magnet performance rather than mine supply, so AML’s work sits at the downstream end of the value chain where OEMs are signalling they will pay a US$10–20/kg premium for diversified sourcing.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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