Dispersion of TiN in aqueous media

Microchemical and microstructural changes of nano-TiN powder during vacuum heat treatment

“…The binding energy value of Ti 2p2/3 (at around 455 eV) and Ti 2p1/2 (at around 461 eV) agreed with the reported data for TiN [15]. Substoichiometric oxide, as oxynitride TiO x N y reported by literature [16] did not appear in the nano-TiN of the paper. It could be concluded that the Ti 2p , O 1s and N 1s core levels indicated the presence of TiO 2 , O 2 and TiN compositions on the surface of the as-received and as-treated nano-TiN powders.…”

Dispersion of nano-TiN powder in aqueous media

“…4(c), the only peak located at about 396.7 eV could be attributed to titanium nitride [22]. Substoichiometric oxynitride TiO x N y reported by the literature [1] does not appear in the paper.…”

“…TiN possesses excellent intrinsic properties including high hardness, elastic modulus, chemical stability, high electronic conductivity, thermal expansion coefficient, and low friction coefficient [1]. In 1970s, it was introduced into TiC-Ni-Mo cermets [2].…”

“…Zhang et al [1] did research on the dispersion of TiN powder with average particle size 2.30 m and a specific surface area of 1.579 m 2 /g, the result showed that the optimal slurries pH value was determined to be around pH 9.5, and PEI was an effective dispersant for TiN in aqueous media. Shih et al [9] did research on the stabilization of aqueous titanium nitride suspensions with ammonium salt of poly(methacrylic acid) at various pH.…”

Colloidal processing of Fe-based metalceramic composites with high content of ceramic reinforcement

“…Therefore knowledge of the superficial behavior of powders in the suspension medium is a necessary requirement. In a polar medium, such as water, the surface of the non-oxide particles becomes charged due to oxidation/passivation and hydration phenomena, thus the balance between positive and negative sites depends on the electronegativity of the cation of the compound and the pH of the medium (7). The value of the surface charge of the particles (experimentally determined by the measurement of the zeta potential) will determine the behavior of the suspensions within a range of pH, so that to set flow conditions to cast the slurry, it is also necessary carry out a rheological study to optimize the solid content (8,9).…”