In situ formation of low interstitials Ti-TiC composites by gas-solid reaction

Zhang, Ce; Guo, Zhimeng; Yang, Fang; Wang, Haiying; Shao, Yanru; Lu, Boxin

doi:10.1016/j.jallcom.2018.07.344

Cited by 37 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…19 The reinforcements can be better fabricated by the in-situ synthesis technique due to its uniform distribution and favorable cohesion between particles and matrix compared to ex-situ technique, thereby exhibiting the outstanding reinforcing effect. [20][21][22][23][24] Yang et al 13 reported that the formation of in-situ TiB whiskers and TiN particles in brazing seam led to 340% improvement in the shear strength of SiO 2 -BN/Ti joints. Song et al 25,26 also significantly improved the C/C composite/TC4 joints with TiC as reinforcements formed in situ during brazing.…”

Section: The Poor Wettability Of Most Metal On Ceramic Surfacementioning

confidence: 99%

In‐situ synthesis of TiC nanoparticles during joining of SiC ceramic and GH99 superalloy

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: The Poor Wettability Of Most Metal On Ceramic Surfacementioning

confidence: 99%

In‐situ synthesis of TiC nanoparticles during joining of SiC ceramic and GH99 superalloy

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Below the solubility limit (0.05 wt%, room temperature), the reinforcement contribution of C solid solution to the α‐Ti matrix is about 7 MPa per 0.01 wt% [C]. [ 37 ] The substitutional solid solution strengthening effect of Si can be quantitatively expressed by the Fleischer model [ 38,39 ]

\begin{array}{*{20}{c}}{\Delta {\sigma _{\left[ {Si} \right]}} = MGb{c^{1/2}}{{\left| {\frac{{{\varepsilon _{\rm{g}}}}}{{1 + \left| {{\varepsilon _{\rm{g}}}} \right|/2}} - 3\cdot{\varepsilon _{\rm{a}}}} \right|}^{3/2}}}\end{array}

where M is the Taylor factor (= 3.1), G is the shear modulus of Ti matrix (= 45 GPa), b is the Burgers vector (= 0.24 nm), and c is the concentration of substitutional solutes. ε g and ε a are the lattice strain caused by the mismatch of elastic and atomic size between the Si and Ti atoms, respectively.…”

Section: Discussionmentioning

confidence: 99%

High Strength and High Wear‐Resistant Ti Composites Fabricated by Powder Metallurgy Pressureless Sintering

Liu

Sun

Kuang

et al. 2022

Adv Materials Technologies

View full text Add to dashboard Cite

In this work, high strength and high wear‐resistant titanium matrix composites (TMCs) reinforced with in situ TiC derived from pyrolysis of polysilazane (PSZ) are fabricated successfully. The processing technology is developed with a novel powder metallurgy method combining solution‐assisted wet mixing and pressureless sintering. The effects of PSZ addition on the microstructure, hardness, mechanical properties, and tribological properties are systematically studied. The TMCs possess better comprehensive properties compared to conventional ex situ methods. The pyrolysis of PSZ leads to the formation of TiC particles and N, Si atoms solid‐solution in the Ti matrix. The microstructure of the composites is homogenous and fine‐grained. The average grain size of α‐Ti decreases significantly from 106.1 µm of pure Ti to 37.2 µm of the 1.5 wt% PSZ/Ti composite. Among these TMCs, the 1.5 wt% PSZ/Ti composite displays comprehensively excellent mechanical properties with the ultimate tensile strength (UTS) of 711 MPa, yield strength (YS) of 568 MPa, and elongation (EL) of 8.0%. In addition, the composite possesses a high wear resistance with a low specific wear rate of 0.355 × 10−12 m3 N−1 m−1 under constant condition (0.03 m s−1, 2N).

show abstract

“…In such cases, it is easy to form precipitates, such as rutile and alumina [29]. Therefore, in our previous works [30,31], powder transfer and powder handing are taken under Ar atmosphere in the entire procedure to control the interstitial content, especially oxygen content. Correspondingly, the oxygen content of Ti-23Al-17Nb with comprehensive mechanical properties is below 1500 ppm [15].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of High Relative Density γ-TiAl Alloy Using Irregular Pre-Alloyed Powder

Yan

Yang

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

Preparing high relative density γ-TiAl alloy by pressure-less sintering at low-cost has always been a challenge. Therefore, a new kind of non-spherical pre-alloyed TiAl powder was prepared by the reaction of TiH2 powder and Al powder at 800 °C to fabricate high-density Ti-48Al alloy via pressure-less sintering. The oxygen content was controlled to below 1800 ppm by using coarse Al powder (~120 μm). The sintered densities ranged from 92.1% to 97.5% with sintering temperature varying from 1300 °C to 1450 °C. The microstructure of the sintered compact was greatly influenced by the sintering temperature. The as-sintered samples had a near-γ structure at 1350 °C, a duplex structure at 1400 °C, and a nearly lamellar structure at 1450 °C. To achieve full densification, non-capsule hot isostatic pressing was performed on the 1350 °C and 1400 °C sintered samples. As a result, high compressive strengths of 2241 MPa and 1931MPa were obtained, which were higher than the existing Ti-48Al alloys.

show abstract

In situ formation of low interstitials Ti-TiC composites by gas-solid reaction

Cited by 37 publications

References 37 publications

In‐situ synthesis of TiC nanoparticles during joining of SiC ceramic and GH99 superalloy

In‐situ synthesis of TiC nanoparticles during joining of SiC ceramic and GH99 superalloy

High Strength and High Wear‐Resistant Ti Composites Fabricated by Powder Metallurgy Pressureless Sintering

Microstructure and Mechanical Properties of High Relative Density γ-TiAl Alloy Using Irregular Pre-Alloyed Powder

Contact Info

Product

Resources

About