Microstructure and mechanical properties of hot pressed Ti3SiC2/Al2O3

Qi, Fugang; Shi, Guopu; Xu, Kaimeng; Su, Tao; Wang, Zhi; Wu, Junyan; Li, Qinggang; Wu, Hao; Zhang, Liu; Zhu, Rongchang; Yang, Binze

doi:10.1016/j.ceramint.2019.01.241

Cited by 21 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of powder XRD analysis showed that the powder consisted of Ti 3 SiC 2 as the main phase and TiC as the secondary phase. The diffractograms of Ti-Si-C coatings showed a decrease in the intensity of Ti 3 SiC 2 diffraction lines and an increase in TiC intensity, which indicated a partial decomposition of the Ti-Si-C system and agreed with the data [24][25][26][27][28][29][30][31]. A decrease in the intensity of diffraction lines in the Ti-Si-C system after detonation spraying was due to the deintercalation of silicon from Ti-Si-C lattice layers [25,26] since the silicon flatness had weak connections with Ti-C flatness.…”

Section: Resultssupporting

confidence: 75%

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

et al. 2021

View full text Add to dashboard Cite

The paper considers the research results of structural-phase state and tribological characteristics of detonation coatings based on Ti–Si–C, obtained at different filling volumes of the explosive gas mixture barrel of a detonation gun. The results analysis indicates that the phase composition and properties of detonation coatings strongly depend on the technological parameters of spraying. With an increase of the explosive mixture in the filling volume of the detonation barrel up to 70% of the coatings consist mainly of the TiC phase, because high temperature leads to a strong decomposition of Ti3SiC2 powders. Thus, the XRD results confirm that at 70% of the explosive gas mixture’s filling volume, partial decomposition and disintegration of the powders occurs after detonation spraying. We established that detonation coatings based on titanium carbosilicide obtained at the explosive gas mixture’s filling volume at 60% are characterized by high wear resistance and adhesive strength. Thermal annealing was performed after spraying in the temperature range of 700–900 °C for 1 h to reduce microstructural defects and improve the Ti–Si–C coating characteristics. As a result of the heat treatment in the Ti–Si–C system at 800 °C, we observed that an increase in the volume fraction of the Ti3SiC2 and TiO2 phases led to a 2-fold increase in microhardness. This means that the after-heat-treatment can provide a sufficient reaction time for the incomplete reaction of the Ti–Si–C (TSC) coating during the detonation gun spraying. Thus, annealing can provide an equal distribution of elements in the coatings.

show abstract

Section: Resultssupporting

confidence: 75%

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

et al. 2021

View full text Add to dashboard Cite

show abstract

“…1) shows that the position of the diffraction peak shifted to the left. This implies an increase in the interplanar distance [26]. The radius and lattice spacing of Al atoms are larger than those of Si atoms.…”

Section: Phase Compositionsmentioning

confidence: 99%

High Purity and High Density Ti3SiC2/Al2O3 Composites Were Prepared at High Temperature

Wang¹,

Qi²,

Ji³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

In this study, Ti3SiC2/Al2O3 composites were prepared via in-situ hot pressing sintering at 1550 °C. Al used as a sintering aid reduced the production of TiC impurity phase and stabilized the crystal lattice of Ti3SiC2 to inhibit its decomposiition at high temperature. This is because Al replaced some of the Si atoms to form Ti3(Si1 − xAlx)C2, which showed a crystal structure similar to that of Ti3SiC2. The addition of Al is a prerequisite for the formation of high density Ti3SiC2/Al2O3 composites at high temperature. Laminar Ti3SiC2 grains and granular Al2O3 grains were densely packed and tightly bonded, furthermore, unique mosaic structure of Ti3SiC2-Al2O3 created at high temperatures improve the mechanical properties such as hardness, bending strength and fracture toughness of Ti3SiC2/Al2O3 composites, with the highest reaching 16.97 GPa, 553.38 MPa and 9.63 MPa·m1/2, respectively. The mechanism responsible for improved mechanical properties for Ti3SiC2/Al2O3 composites were the synergistic action of grain pullout, microcrack deflection, and extend the crack growth from two different kinds of grains.

show abstract

“…Alumina ceramics, which exhibit high hardness, suitable flexure strength, and high chemical stability, have attracted significant attention in recent years, and as a result, they have been commonly used in industry [1][2][3]. However, their low fracture toughness limits their further development as a reliable ceramic material [4], and therefore, a novel material should be designed to address this issue [5,6]. For example, self-toughening Al2O3 ceramics [7], graphene nanoplate-toughened Al2O3-based ceramics [8], and multiwalled carbon nanotube-toughened Al2O3-based ceramics [9],…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Ti3SiC2 contains strong covalent Ti-C bonds and weak metallic Ti-Si bonds, thereby resulting in a combination of ceramic and metallic properties [26,27], indicating its potential to act as a toughening phase in alumina ceramics. Recently, our group synthesized Ti3SiC2/Al2O3 ceramic composites and found a clear boundary between the Ti3SiC2 and Al2O3 crystal surfaces, in addition to improved mechanical properties compared to the Al2O3 system alone [4,28]. First-principles calculations, which can be used to reveal the atomic and electronic structures of crystals, are widely employed in the study of MAX phases [29,30], such as in the study of solid solutions [18,31], surface properties, and interface properties [32].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of hot pressed Ti3SiC2/Al2O3

Cited by 21 publications

References 24 publications

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

High Purity and High Density Ti3SiC2/Al2O3 Composites Were Prepared at High Temperature

Interface properties of Ti3SiC2/Al2O3 ceramics: Combined experiments and first-principles calculations

Contact Info

Product

Resources

About

Microstructure and mechanical properties of hot pressed Ti3SiC2/Al2O3

Cited by 21 publications

References 24 publications

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

Structural Features and Tribological Properties of Detonation Gun Sprayed Ti–Si–C Coating

High Purity and High Density Ti3SiC2/Al2O3 Composites&nbsp;Were Prepared at High Temperature

Interface properties of Ti3SiC2/Al2O3 ceramics: Combined experiments and first-principles calculations

Contact Info

Product

Resources

About

High Purity and High Density Ti3SiC2/Al2O3 Composites Were Prepared at High Temperature