Ti3AlC2
Overview
Ti3AlC2 belongs to the MAX phase family of layered ternary carbides and nitrides, characterized by a unique combination of metallic and ceramic properties. Discovered in the 1990s, these materials bridge the gap between conventional ceramics and metals. Ti3AlC2 specifically stands out for its exceptional thermal shock resistance and self-lubricating properties, derived from its hexagonal crystal structure with alternating layers of Ti6C octahedra and Al atoms. As a synthetic material, Ti3AlC2 is produced via high-temperature synthesis methods such as hot pressing or spark plasma sintering of titanium, aluminum, and carbon precursors. Its commercial availability has grown due to demand in extreme environment applications where traditional materials fail.
Physical and Chemical Properties
Ti3AlC2 exhibits a Vickers hardness of 3-5 GPa and Young's modulus of 297 GPa, comparable to some titanium alloys but with superior high-temperature performance. Unlike conventional ceramics, it maintains conductivity (3.1×10^6 S/m) while being thermally stable up to 1400°C in inert atmospheres. The material's fracture toughness (7-9 MPa·m^1/2) exceeds most technical ceramics due to its layered structure enabling energy dissipation through kink band formation. Chemically, Ti3AlC2 forms a protective Al2O3 layer when exposed to oxygen at elevated temperatures, granting oxidation resistance up to 1200°C. It demonstrates remarkable corrosion resistance against molten metals and salts, though prolonged exposure to strong acids or alkalis may cause degradation.
Main Applications
In aerospace, Ti3AlC2 serves as a lightweight alternative for turbine blade coatings and thermal protection systems, withstanding temperatures beyond 1000°C. Its electrical conductivity enables use as sliding electrical contacts in high-current systems, outperforming copper-graphite composites in durability. The electronics industry utilizes Ti3AlC2 for heat spreaders in power modules and as diffusion barriers in semiconductor packaging. Emerging applications include nuclear reactor components (neutron irradiation resistance) and additive manufacturing feedstock for high-performance parts. Recent research explores its potential as a catalyst support for fuel cells due to its high surface area when delaminated into 2D MXenes.
Safety and Storage
As a fine powder, Ti3AlC2 requires handling with NIOSH-approved N95 respirators to prevent pulmonary irritation. Processing should occur in well-ventilated areas or under local exhaust ventilation. The material is non-flammable but may react with strong oxidizers at high temperatures. Storage recommendations include argon-filled desiccators or vacuum-sealed containers to minimize surface oxidation. Bulk forms are more stable but should be kept away from moisture to prevent gradual hydrolysis. Spills should be collected using HEPA-filter vacuums rather than dry sweeping to avoid airborne dispersion.
B2B Procurement Guide
Industrial buyers should verify material certifications including XRD analysis (confirming phase purity >95%) and particle size distribution reports. Technical datasheets must specify key parameters: oxygen content (<0.5 wt%), carbon stoichiometry (C/Ti ratio 0.66±0.03), and typical grain dimensions (1-20 μm for powders). Major suppliers include 3M Advanced Materials, Sandvik AB, and Kanthal, with lead times of 8-12 weeks for custom formulations. Bulk orders (100+ kg) may qualify for 15-20% discounts. Consider requesting samples for thermal cycling tests (100+ cycles between RT-1000°C) to evaluate performance for specific applications.
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