Overview
Niobium-Titanium (Nb-Ti) powder is a metallic alloy composed of niobium and titanium, typically in ratios optimized for specific applications, such as the widely used Nb-47%Ti superconducting alloy. It is produced via atomization or mechanical alloying, resulting in fine particles with uniform composition. The alloy combines niobium's superconductivity with titanium's mechanical strength, making it indispensable for high-tech industries. Its development in the 1960s revolutionized superconducting magnet technology, enabling advancements in MRI machines and particle accelerators.
Physical and Chemical Properties
Nb-Ti powder exhibits exceptional cryogenic stability, retaining ductility even at liquid helium temperatures (4.2K), a critical trait for superconducting wires. Its transition temperature (Tc) ranges from 9–10K, depending on the titanium content and processing methods. Chemically, the alloy resists corrosion from body fluids and many acids, though hydrofluoric acid can dissolve it. The powder's particle size distribution (commonly 10–100µm) affects sintering behavior, with finer powders offering higher density in final products.
Main Applications
Over 80% of Nb-Ti powder is used in superconducting magnet systems, including MRI scanners (70+% of global market) and nuclear fusion reactors like ITER. The powder is processed into wires via the bronze route, where it is encased in copper for stabilization. In aerospace, it serves in lightweight structural components and turbine blades due to its strength-to-weight ratio. Medical applications include porous implants for bone integration, leveraging its biocompatibility and MRI compatibility.
Safety and Storage
As a fine metal powder, Nb-Ti poses dust explosion risks (minimum ignition energy <10mJ). Storage requires inert gas (Ar/N2) or vacuum sealing to prevent oxidation. Facilities should adhere to ATEX standards for explosive atmospheres. Personal protective equipment (PPE) like N95 masks and antistatic gloves are mandatory during handling. Spills should be collected using non-sparking tools and stored in labeled, conductive containers for recycling.
B2B Procurement Guide
Key specifications for procurement include: alloy ratio (e.g., Nb-47wt%Ti for superconductors), oxygen content (<500ppm for critical applications), and particle size distribution (D50 typically 15–45µm). Certificates of analysis (CoA) should confirm composition via ICP-MS. Bulk buyers (100kg+) can negotiate prices down to ~$180/kg. Lead times vary from 4–12 weeks due to specialized production. Preferred suppliers include Western Superconducting (China) and ATI Metals (USA), offering traceable lot numbers for quality control.
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