Substitutes

Substitutes and Alternatives for Ruthenium

The availability of viable substitutes is a key factor in assessing Ruthenium's criticality. Across its 3 primary applications, substitution options range from commercially viable alternatives with performance trade-offs to applications where Ruthenium currently has no effective substitute.

Substitution Analysis by Application

The following table details available substitutes for Ruthenium across its primary applications, including the trade-offs involved:

Performance Trade-offs

In most applications, substituting Ruthenium involves measurable performance penalties. Ruthenium seed layers and spacer layers are essential for PMR (perpendicular magnetic recording) technology in modern HDDs; heat-assisted magnetic recording (HAMR) may change material requirements. In high-performance applications such as hard disk drive coatings, these trade-offs can be particularly significant.

Research and Development

Active research programs are underway to develop improved substitutes and to reduce the amount of Ruthenium required per unit of product (thrifting). However, timelines for commercializing new alternatives typically span years to decades. The limited substitutability of Ruthenium is a primary driver of its high criticality rating, prompting government-funded substitution research programs.