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Electro-deposition of Bi-axial Textured Layers on a Substrate

National Renewable Energy Laboratory

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Technology Marketing Summary

To be commercially viable, superconducting materials used in various applications must have high critical current densities because high electrical current is required to power any significant load. It has been shown that superconducting materials formed with bi-axially textured layers have superior critical current densities. The National Renewable Energy Laboratory has developed electro-deposited, bi-axially textured buffer layers for depositing a superconducting material onto a substrate in a manner that will promote biaxial textured growth with reduced degradation to the superconducting material.


It is now well established that bi-axially textured crystalline substrates are critical to obtaining superior critical current densities (Jc) for YBa2Cu3O7-s (YBCO) superconductors. As opposed to uni-axial texturing which describes a polycrystalline material in which a significant number of crystal particles in the cluster structures are oriented uniformly in one of the three axial directions in three-dimensional space, bi-axial texturing describes material in which a significant number of the crystal particles in the cluster structures are oriented generally uniformly in all of the three axes.

One way to accomplish biaxial texturing in a superconducting material is to grow epitaxial YBCO onto bi-axially textured metal substrates. During the deposition and the resulting growth of the superconductor material, the growing crystalline particles tend to conform themselves to the same bi-axially textured, crystalline orientation of the substrate. However, one drawback to depositing a superconducting material directly onto a metal substrate (e.g., Ni, Ni-W) is that many materials used to form superconductors interact adversely with the substrate in a manner that degrades the superconductor material. To overcome this, the present invention provides a method of depositing a buffer layer (selected from the group of rare earths, transition metals, actinide, lanthanides and oxides) between the substrate and the superconducting material that acts as a chemical barrier while still allowing the transference of the bi-axial texture.

Bi-axially textured layers may be prepared on a substrate inexpensively by an electro-deposition method. Electro-deposition is a non-vacuum, high rate deposition process that deposits uniform layer (or "layers") on large non-planar substrates. As compared to methods that require vacuum equipment, this non-vacuum method of electro-deposition is significantly less costly.

  • Attains superior critical current density of a superconducting material
  • Protects the superconducting material from degradation
  • Reduces capital expenditures due to low cost, non-vacuum technology
Applications and Industries
  • Superconductors
  • Semiconductors
  • Magnetics
  • Optics
  • Sensors
  • Photovoltaics
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 8,586,506
Electrodeposition of biaxially textured layers on a substrate
Methods of producing one or more biaxially textured layer on a substrate, and articles produced by the methods, are disclosed. An exemplary method may comprise electrodepositing on the substrate a precursor material selected from the group consisting of rare earths, transition metals, actinide, lanthanides, and oxides thereof. An exemplary article (150) may comprise a biaxially textured base material (130), and at least one biaxially textured layer (110) selected from the group consisting of rare earths, transition metals, actinides, lanthanides, and oxides thereof. The at least one biaxially textured layer (110) is formed by electrodeposition on the biaxially textured base material (130).
Technology Status
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To: Erin Beaumont<>