Thermal expansion of the nanocrystalline titanium diboride

Kovalev, D. Yu.; Khomenko, N. Yu.; Shilkin, S. P.

doi:10.1016/j.ceramint.2021.09.169

Cited by 6 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the course of deposition, the NiTi 2 phase fully dissolves under exposure to the laser beam, and the NiTi phase is partially dissolved in the Inconel 625 melt [ 23 ]. The lattice parameters of all the detected phases are close to the theoretical ones [ 24 , 25 , 26 ]. There is a slight shift of the peaks of these phases in the X-ray patterns.…”

Section: Resultssupporting

confidence: 72%

Effect of the Mass Fraction of NiTi–TiB2 SHS-Particles on the Phase Composition, Structure, and Mechanical Properties of Inconel 625–NiTi–TiB2 Composites Produced by Direct Laser Deposition

et al. 2022

View full text Add to dashboard Cite

This paper studies the impact of the mass fraction of NiTi–TiB2 particles obtained by the method of self-propagating high-temperature synthesis (SHS) on the phase composition, structure, and mechanical properties of composites made by direct laser deposition from an Inconel 625–NiTiz–TiB2 powder mixture. Composites were obtained from a powder mixture with the mass fraction of particles at 5–10 wt%, and they consisted of an Inconel 625 metal matrix wherein ceramic inclusions of titanium diboride TiB2 were distributed. Increasing the mass fraction of SHS-produced NiTi particles from 30 to 95 wt% led to the emergence of a NiTi intermetallide phase in the matrix material as well as an increase in the average TiB2 particle size and formation of their agglomerates. In addition, an increase in the microhardness of the materials was observed. The graph of tensile strength of Inconel 625–NiTi–TiB2 samples has a parabolic shape with a maximum at 1000 MPa (when the mass fraction of SHS-produced NiTi–TiB2 particles is at 30 wt%). A further increase in the mass fraction of NiTi–TiB2 led to a decrease in the tensile strength down to 400 MPa. Here the deformation of samples decreases linearly as the ratio of composite particles in the initial mixture increases. From a comparative analysis of the results obtained, the optimal mass fraction of composite NiTi–TiB2 particles in the Inconel 625-NiTi–TiB2 powder mixture was found to be 5 wt%.

show abstract

Section: Resultssupporting

confidence: 72%

Effect of the Mass Fraction of NiTi–TiB2 SHS-Particles on the Phase Composition, Structure, and Mechanical Properties of Inconel 625–NiTi–TiB2 Composites Produced by Direct Laser Deposition

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It should be noted that studies focused on the determination of CTE are mainly based on X-ray diffraction (XRD) methods. [24][25][26][27][28][29][30][31] This method supposes placing the sample on a solid substrate. The violation of coherence at the film-substrate interface can lead to additional mechanical stresses that complicate the research conduction.…”

Section: Resultsmentioning

confidence: 99%

“…Despite the fact that most works have established an increase in the CTE of nanosized crystallites, some research works have found the opposite effect. [27][28][29][30][31] The theoretical analysis presented in ref. [32] shows that the direction of change in CTE in thin films is determined by the surface relaxation, which is resulted that the coefficient itself can either increase or decrease in nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Silver Films with a Low Coefficient of Thermal Expansion as a Promising Material for Nanoelectronics

Дукаров

Petrushenko

Sukhov

et al. 2022

Physica Status Solidi (a)

View full text Add to dashboard Cite

The results of a study of the thermal expansion of thin silver films obtained by thermal vacuum evaporation are presented. It is shown that, after single heating, the films consist of two types of crystallites. The nanosized fraction, for which the main area of the film is accounted, is represented by crystallites with a size of 50–60 nm. In addition to them, separate grains of hundreds of nanometers in size are observed in the samples, many of which are formed during the condensation process. The coefficient of linear thermal expansion of nanocrystalline films which is only 7 × 10−6 K−1 is determined by electron diffraction using the method of measurement standard. This is significantly lower than the value which is typical for bulk samples. The decrease in the coefficient of thermal expansion is explained by the nanocrystalline nature of the films. The closeness of the obtained value to the coefficient of thermal expansion of silicon and germanium allows us to consider the use of nanocrystalline silver films as an effective way to improve the reliability and efficiency of modern and prospective microelectronics.

show abstract

Titanium boride fibers prepared by chloride-assisted carbothermic method for high-performance electromagnetic wave absorption

Wang

Liang

et al. 2023

Ceramics International

View full text Add to dashboard Cite

Thermal expansion of the nanocrystalline titanium diboride

Cited by 6 publications

References 22 publications

Effect of the Mass Fraction of NiTi–TiB2 SHS-Particles on the Phase Composition, Structure, and Mechanical Properties of Inconel 625–NiTi–TiB2 Composites Produced by Direct Laser Deposition

Effect of the Mass Fraction of NiTi–TiB2 SHS-Particles on the Phase Composition, Structure, and Mechanical Properties of Inconel 625–NiTi–TiB2 Composites Produced by Direct Laser Deposition

Nanostructured Silver Films with a Low Coefficient of Thermal Expansion as a Promising Material for Nanoelectronics

Titanium boride fibers prepared by chloride-assisted carbothermic method for high-performance electromagnetic wave absorption

Contact Info

Product

Resources

About