Aerospace Suppliers Test Rare-Earth Alternatives to Reduce China Reliance

Post by : Saif

Aerospace suppliers are bringing back older turbine coating technologies as shortages of rare earth materials raise concerns about the industry’s heavy dependence on China. Companies and research groups are examining materials that were developed decades ago but were later replaced by more advanced rare-earth-based coatings.

Rare earth materials are important for several aerospace and defense products. They are used in jet engine coatings, turbine components and semiconductor-related technologies. China remains a dominant supplier of many critical minerals and materials, making supply disruptions a growing concern for manufacturers.

Researchers Revisit Older Jet Engine Coatings

The National Research Council of Canada is working with industry partners to examine whether older ceramic materials can provide an alternative to modern rare-earth-based coatings.

Researchers are studying zirconium dioxide and other ceramic oxides that were used in aerospace applications during the 1970s and 1980s. These materials could potentially be improved with modern engineering and testing methods.

The research is focused on thermal barrier coatings, which protect parts of jet engines that operate at extremely high temperatures.

Rogerio Lima, a senior research officer at the National Research Council of Canada, said modern equipment and engineering techniques could help researchers improve older materials and assess whether they can meet current requirements.

Companies Search for Rare-Earth-Free Materials

European thermal coatings producer Oerlikon Metco already sells some products that do not use rare earth materials. The company is also developing additional alternatives.

Some of its products use zirconia-based thermal barrier coatings combined with magnesium and calcium oxides. These materials were used before rare-earth elements became more common in advanced thermal coatings.

US suppliers are also examining non-rare-earth options for some less critical aerospace components. Recycling surplus coating materials is another option being considered to reduce pressure on supplies.

However, replacing rare-earth materials across the aerospace sector remains difficult. Modern jet engines require coatings that can operate under extreme heat and demanding conditions.

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China Remains a Major Supply Concern

Industry experts say alternative materials can reduce some pressure but are unlikely to remove aerospace's dependence on Chinese rare earth supplies in the near term.

Supply disruptions and higher prices have increased concern about the availability of materials needed for the aerospace and defense industries. Finding alternative sources outside China could take years because new materials must go through extensive testing and qualification before they can be widely used in aircraft and engines.

Geoffrey Gertz, a senior fellow at the Center for a New American Security and previously associated with the White House National Security Council, said reducing dependence on China would take years rather than months.

Rare-Earth Supply Becomes a Strategic Issue

The search for alternatives comes as governments and companies look for ways to diversify critical mineral supply chains.

Materials such as yttrium, tungsten and other specialized minerals are used across aerospace, defense and electronics. Any prolonged disruption could create challenges for manufacturers that depend on stable supplies.

Talks between the United States and China could also include rare earth issues, adding importance to efforts to develop alternative materials and supply sources.

For aerospace manufacturers, the current research is not an immediate replacement for rare-earth-based technology. Instead, it is part of a longer effort to reduce supply risks and create additional options for critical components.

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