Microstructure of Cu-TiB₂ Nanocomposite during Spark Plasma Sintering

Abstract

Microstructural change of TiB2-Cu nanocomposite during spark plasma sintering (SPS) was investigated. Under simultaneous action of pressure, temperature and pulse electric current titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a interpenetrating phase composite with a fine-grained skeleton. Increase of SPS temperatures and holding times promotes the densification of sintered compacts due to local melting of copper matrix.

Processing and Characterization of Spark Plasma Sintered SiC-TiB2-TiC Powders

“…Titanium diboride is commonly known for its excellent physical, mechanical, and chemical properties, such as its exceptional hardness, wear and corrosion resistance [25], and high thermal and electrical conductivities [26], making TiB 2 an attractive reinforcement material for cutting tools and wear-resistant parts based on SiC ceramic [27]. Furthermore, TiB 2 is also used as a phase in cutting tools, in which it serves the functions of lubrication and crack healing due to its transformation to TiO 2 and B 2 O 3 under the action of the cutting heat [28].…”

Synthesis and Characterization of Cu–TiC Nanocomposites by Ball Milling and Spark Plasma Sintering

“…It is a solid-state process with two most important events involved in mechanical milling: the repeated welding and fracturing of the powder mixture. A variety of advanced materials included nano-structured materials and ceramic materials powders with higher activity by mechanically ball milling can be synthesized [4][5][6]. The traditional sintering techniques have a strong limitation of not being able to retain the nano-structure due to the problem of grain growth.…”

Preparation of TiB<SUB>2</SUB>&ndash;SiC Eutectic Composite by an Arc-Melted Method and Its Characterization

“…Titanium boride (TiB 2 ) is also an excellent engineering material with high electrical conductivity, thermal conductivity and hardness. [7][8][9][10][11][12] The addition of TiB 2 was found to be effective to increase the fracture toughness of SiC. 13) Therefore, the TiB 2 -SiC composites could be an excellent candidate engineering material with the combined properties of TiB 2 and SiC.…”