Performance Characteristics and Application Areas of Titanium Carbide (TiC)

Release time:

2026-03-14 09:04

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1. Performance Characteristics of Titanium Carbide

1 Physical and Thermal Properties

TiC is a metallic‑lustered crystal with an iron‑gray appearance, adopting the NaCl‑type face‑centered cubic structure. It has a melting point of approximately 3140 °C, classifying it as an ultra‑high‑melting, refractory material. With a density of about 4.93 g/cm³, it offers potential for lightweight, high‑strength applications. It exhibits a low coefficient of thermal expansion, moderate thermal conductivity, excellent dimensional stability at elevated temperatures, and outstanding thermal shock resistance, enabling it to withstand severe temperature‑cycling conditions.

2 Mechanical Properties

TiC exhibits a Mohs hardness of 9–10, high microhardness, and excellent elastic modulus and flexural strength, demonstrating superhardness, wear resistance, and resistance to erosion. Under tribological conditions, it exhibits a low wear rate, making it an ideal wear‑resistant reinforcement phase and coating material that can significantly extend the service life of the matrix.

3 Chemical Stability

At room temperature, TiC is insoluble in water and common acids and bases, exhibiting excellent chemical stability; it corrodes only in strongly oxidizing mixed acids. In high‑temperature, non‑oxidizing environments, its microstructure and mechanical properties remain stable, and it can form strong interfacial bonds with metallic and ceramic matrices, making it suitable for use in high‑temperature alloys, cemented carbides, and multiphase ceramic systems.

4 Electrical and Functional Properties

TiC exhibits excellent metallic electrical conductivity and can be employed as a conductive ceramic, electrode material, and diffusion barrier. It also possesses superior electromagnetic shielding and current‑carrying capabilities, while displaying even richer functionalities in low‑dimensional structures such as two‑dimensional titanium carbide (MXene), thereby opening up new possibilities for flexible electronics, energy storage, and sensing applications.

II. Main Application Areas of Titanium Carbide

1 Cemented Carbides and Cutting Tools

TiC is an important modifying component in WC‑based cemented carbides, enhancing red hardness, oxidation resistance, and resistance to crescent‑shaped crater wear. It is widely used in turning tools, milling cutters, drills, and precision molds. TiC‑coated cutting tools excel in machining difficult-to-cut materials, significantly improving both machining efficiency and tool life, and are one of the core materials for high‑end cutting tools.

2 Aerospace and High-Temperature Structural Components

TiC exhibits excellent high-temperature resistance, low density, and high strength, making it suitable for hot-end components of aeroengines, rocket nozzles, thermal protection coatings, and structural reinforcements in aerospace vehicles. When incorporated as a reinforcing phase into titanium alloys and high-temperature alloys, it enhances both elevated‑temperature strength and fatigue resistance, thereby meeting the demanding service requirements under extreme temperature and loading conditions.

3 Surface Engineering and Wear- and Corrosion-Resistant Coatings

TiC coatings are prepared using techniques such as CVD, PVD, and plasma spraying, and can be applied to construction machinery, mining cutting tools, critical automotive components, oilfield drilling equipment, and more. These coatings enhance surface wear resistance, corrosion resistance, and high-temperature oxidation resistance, significantly extending component service life and reducing maintenance costs.

4. Electronic Information and Semiconductor Devices

TiC’s high electrical conductivity, low thermal diffusivity, and excellent barrier properties make it suitable for use as a diffusion barrier layer and an ohmic contact layer in integrated circuits; it also serves as an electrode and a transition layer in memory devices and power devices. Low-dimensional TiC-based materials demonstrate application potential in flexible electronics, electromagnetic shielding, and sensor devices, thereby driving the development of next-generation electronic components.

5. New Energy and Energy Storage Sector

TiC and TiC-based composites can be used for battery anode modification, fuel cell bipolar plate coatings, and electrolysis electrodes, thereby enhancing electrode conductivity, structural stability, and cycle life. In the nuclear industry, TiC’s radiation resistance and chemical stability make it suitable as a nuclear structural material and as an anti-tritium coating.

6 Refractory Materials and the Metallurgical Industry

TiC, when used as an additive, can enhance the high-temperature strength and slag‑resistance of refractory materials, making it suitable for metallurgical furnace linings, crucibles, and high‑temperature kiln furniture. In metal smelting, it serves as a deoxidizer and grain‑refining agent, improving the quality of metallurgical products and extending the service life of high‑temperature furnace components.

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