The effect of titanium addition on the microstructure, mechanical and tribological properties of Ni<sub>3</sub>Si alloys prepared by powder metallurgy method

Zhang, Xingyun; Niu, Muye; Wu, Changyin; Chen, J.

doi:10.1002/mawe.201700163

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…The Ni 3 Si alloys with different Ti addition were prepared by mechanical alloying and vacuum hot-pressing sintering. The preparation process is described in detail elsewhere [24]. The tribological tests were carried out by a ball-on-disk tribometer with the alloys and bearing steel balls as a counter material.…”

Section: Methodsmentioning

confidence: 99%

“…The compositions of the contact region and the wear region were 58.4Ni-16.3Si-14.2Ti-10.0O and 68.2Ni-26.2Si-5.6O, respectively. This was because of the harder phase Ni 3 Ti (about 700 HV) formed during the sintering process, which was able to support the applied load effectively [24]. In contrast, the Si-rich region (the wear region, about 500 HV) had lower hardness, and was worn out firstly.…”

Section: Wear Mechanisms Of the Alloysmentioning

confidence: 99%

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Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Niu

Bao

et al. 2020

Materials

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The tribological properties of Ni3Si alloy were studied at high temperatures. The effect of the addition of Ti was also analyzed. The surface composition was analyzed by Raman spectroscopy. The results showed that the friction coefficient decreased with the increasing temperature, and the wear rate changed slightly from 25 to 400 °C. However, the wear resistance of the alloys decreased sharply at 600 °C, and this was due to the decrease of the high-temperature strength and the severe oxidation of the alloys. Although the oxidation resistance of Ni3Si alloy decreased with Ti addition, the tribological property was improved by the addition of Ti. The Ni3Si alloy with 5% Ti addition had the best wear resistance at high temperatures as compared to pure Ni3Si alloy and with 10% Ti addition, and the wear rates of the alloys were in the order of magnitude of 10−5 mm3/Nm. With the increase of temperature, the wear mechanism of pure Ni3Si alloy transformed from abrasive wear to oxidation wear. As the Ti content increased, the wear mechanisms of the alloys changed from abrasive wear to fatigue wear at low temperature, and oxidation wear and fatigue wear at high temperature.

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Section: Methodsmentioning

confidence: 99%

Section: Wear Mechanisms Of the Alloysmentioning

confidence: 99%

Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Niu

Bao

et al. 2020

Materials

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“…However, this approach can inadvertently induce cracking [5]. Instead, adding specific elements such as boron (B) [6,7], carbon (C) [6], and titanium (Ti) [8,9] increases the ductility in transition metal silicides by changing the mode of failure. In Figure 1, schematics of the difference between intergranular and transgranular fractures are presented.…”

Section: Introductionmentioning

confidence: 99%

Gas-Atomized Nickel Silicide Powders Alloyed with Molybdenum, Cobalt, Titanium, Boron, and Vanadium for Additive Manufacturing

Ibrahim,

Du,

Hovig

et al. 2023

Metals

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Nickel silicides (NiSi) are renowned for their ability to withstand high temperatures and resist oxidation and corrosion in challenging environments. As a result, these alloys have garnered interest for potential applications in turbine blades and underwater settings. However, their high brittleness is a constant obstacle that hinders their use in producing larger parts. A literature review has revealed that incorporating trace amounts of transition metals can enhance the ductility of silicides. Consequently, the present study aims to create NiSi-based powders with the addition of titanium (Ti), boron (B), cobalt (Co), molybdenum (Mo), and vanadium (V) for Additive Manufacturing (AM) through the process of gas atomization. The study comprehensively assesses the microstructure, phase composition, thermal properties, and surface morphology of the produced powder particles, specifically NiSi11.9Co3.4, NiSi10.15V4.85, NiSi11.2Mo1.8, and Ni-Si10.78Ti1.84B0.1. Commonly used analytical techniques (SEM, EDS, XRD, DSC, and laser diffraction) are used to identify the alloy configuration that offers optimal characteristics for AM applications. The results show spherical particles within the size range of 20–63 μm, and only isolated satellites were observed to exist in the produced powders, securing their smooth flow during AM processing.

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“…In composite materials, the size of the crystallites is very significant for evaluating the bulk properties (mechanical, chemical, and electrical properties) [12,13]. Several authors examined the x-ray diffraction analysis of ball-milled mechanically alloyed composites concerning mixing time [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of mixing time on the crystallite size and lattice strain of the AA7075/TiC composites

Alam

Azeem

et al. 2021

Materialwissenschaft Werkst

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With numerous reinforcements, aluminum and its alloys are finding growing applications in every sector of industry. Titanium carbide (TiC) is regarded as an outstanding reinforcing material as compared to widely used carbide particles because of its excellent physical and mechanical characteristics, as well as its especially good interfacial bonding (wetting) capacity with aluminum. In the present research work, the effect of the mixing time of the matrix and reinforcement powders has been investigated on the crystallite size and lattice strain of the AA7075–5 wt.% TiC composites. The mechanical properties of the developed composites were also investigated in terms of microhardness values. X‐ray diffraction and scanning electron microscopy (SEM), transmission electron microscopy (TEM), particles size distribution analysis and x‐ray energy dispersive spectroscopy (EDS) of the synthesized powder samples were done to see the effect of mixing time on their microstructures. The increase in mixing time led to a homogeneous distribution of 5 wt.% of TiC particles, a decrease in particles clustering. The considerable grain refining was confirmed, which reflected a reduction in particle size originating from a prolonged mixing time. The significant improvement in the crystallite size and microhardness of the produced composites were achieved with increasing mixing time.

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The effect of titanium addition on the microstructure, mechanical and tribological properties of Ni₃Si alloys prepared by powder metallurgy method

Cited by 5 publications

References 22 publications

Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Gas-Atomized Nickel Silicide Powders Alloyed with Molybdenum, Cobalt, Titanium, Boron, and Vanadium for Additive Manufacturing

Investigating the effect of mixing time on the crystallite size and lattice strain of the AA7075/TiC composites

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The effect of titanium addition on the microstructure, mechanical and tribological properties of Ni3Si alloys prepared by powder metallurgy method

Cited by 5 publications

References 22 publications

Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Friction and Wear Properties of Ni3Si Alloy with Ti Addition at High Temperatures

Gas-Atomized Nickel Silicide Powders Alloyed with Molybdenum, Cobalt, Titanium, Boron, and Vanadium for Additive Manufacturing

Investigating the effect of mixing time on the crystallite size and lattice strain of the AA7075/TiC composites

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The effect of titanium addition on the microstructure, mechanical and tribological properties of Ni₃Si alloys prepared by powder metallurgy method