Dysprosium

No commercially viable substitute exists at scale. Terbium can perform a similar coercivity-enhancing role but is even rarer and more expensive. SmCo magnets offer superior high-temperature performance but are costlier with lower energy product. The primary mitigation is grain boundary diffusion (GBD) technology, which reduces Dy content per magnet by 60-75% without eliminating it entirely.

Dysprosium oxide prices surged from ~US$330-380/kg in Q1 2025 to over US$930/kg by early 2026, driven by China's April 2025 export licensing requirements and Myanmar border disruptions. Structural factors include extreme geographic concentration (China controls 85-90% of refining), limited non-Chinese separation capacity, and rising demand from EV and wind-turbine deployment.

A typical EV traction motor uses 1-3 kg of NdFeB magnets, with Dy comprising 3-5% of the rare earth mass -- implying 30-150 grams of Dy oxide per vehicle. For 20 million EVs per year globally, aggregate Dy demand from EVs alone reaches 600-3,000 tonnes per year. GBD technology is progressively reducing Dy content per motor, but deployment growth outpaces efficiency gains.

By late 2026-2027, collective non-Chinese output (Lynas, Energy Fuels, MP Materials, Ucore) is projected at 75-150 tonnes/year Dy oxide -- less than 2-3% of global demand. Meaningful diversification (10-15% non-Chinese) is projected for 2029-2032. Complete supply security will require decade-scale development of multiple new mines and processing centres.

GBD is a technology that heats a sintered NdFeB magnet near a Dy source at 800-1,000 C, diffusing Dy atoms into grain boundaries where they are most effective. The result: a magnet with 0.5-1% bulk Dy achieves coercivity equivalent to one with 3-4% bulk Dy, reducing consumption by 60-75% per magnet. GBD is widely adopted by leading manufacturers (Shin-Etsu, TDK, JL Mag, Zhong Ke San Huan).

Ferrite magnets deliver only 40-50% of the energy product (BHmax) of NdFeB, requiring substantially larger and heavier motors for equivalent output. This is economically prohibitive for automotive and wind applications where power density matters. Tesla and other manufacturers have evaluated rare-earth-free motor designs and continue to select NdFeB after technical and economic analysis.