The spark plasma sintering of the optimized parametric process for the magnesium alloy reinforced hybrid nano-ceramics

Fayomi, J.; Popoola, A. P. I.; Popoola, Olawale; Aigbodon, Victor; Agboola, Oluranti

doi:10.1007/s00170-022-10617-1

Cited by 4 publications

(5 citation statements)

References 55 publications

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“…It could also be observed that as the ST increases, the microstructural refinement increases. The reduction in pore space and higher densification observed could be attributed to condensation and diffusion of constituent elements during the sintering process at the given ST [27]. Figure 4g, h, and i shows fully formed adhesion of particles and excellent microstructural refinement.…”

Section: Microstructural Study Of the Sintered Samplesmentioning

confidence: 92%

“…This implies that as the ST increases, the diffusion rate is enhanced; hence, pores are rapidly closed, leading to porosity reduction and microstructure refinement [44][45][46][47]. Therefore, as the ST and HR increase, there is a corresponding increase in weight and improvement in strength [27].…”

Section: Mechanical Analysismentioning

confidence: 99%

“…Indisputably, the SPS process has been demonstrated to be excellent powder metallurgy (PM) approach to developing nanostructured ultrafine-grained materials due to their flexibility in fabricating complex shapes. It produces highly dense consolidated solid materials with good bonding structure and barrier to the coarsening of grains [27]. This process enhanced the consolidation of solid bulk materials at a low temperature.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of process parameters for the development of Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy system via spark plasma sintering

Olorundaisi

Babalola

Bayode

et al. 2023

Int J Adv Manuf Technol

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A novel equal atomic Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy (HEA) was developed via the spark plasma sintering (SPS) process. This study investigates the influence of the sintering parametric processes, which consist of the sintering temperature (ST) and heating rate (HR) at constant pressure and dwelling time (DT) on the Microhardness (MH) and relative density (RD) of the developed HEA. Response surface methodology (RSM) was used to develop a predictive model. The design of experiment (DOE) approach was adopted to reduce the number of experiments and eliminate trial by error. ST and HR were considered model variables in developing the model. The user-defined design (UDD) under RSM was used to predict the optimal sintering parameters, and an experiment was conducted to validate the result. The result indicates that ST and HR play a significant role in achieving high densification and hardness. The developed alloy shows the highest MH value of 136.3 HV at 850 °C and an HR of 100 °C/min. Equally, the least crystallite size of 2.05 µm was realized at the maximum ST. However, the modeling response suggested that full densification of about 99% can be achieved at an ST of 850 °C, a pressure of 50 MPa, a DT of 5 min, and an HR of 100 °C/min.

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Section: Microstructural Study Of the Sintered Samplesmentioning

confidence: 92%

Section: Mechanical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of process parameters for the development of Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy system via spark plasma sintering

Olorundaisi

Babalola

Bayode

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Unquestionably, the SPS techniques have proven to be a good powder metallurgy (PM) way to produce nanostructured ultrafine-grained materials due to the difficulty of fabricating complicated shapes. It produces exceptionally dense, bonded, grain-coarsening-resistant, highly consolidated solid materials [25]. By using this method, solid bulk materials can better be consolidated at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy

Olorundaisi,

Babalola,

Teffo

et al. 2024

MSF

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A high entropy Ni-Al-Ti-Mn-Co-Fe-Cr alloy (HEA) system was fabricated using spark plasma sintering (SPS). The alloys at different elemental compositions were developed at a sintering temperature of 850 °C, a heating rate of 90 °C/min, a pressure of 50 MPa, and a dwelling time of 5 min. The sintered alloys' mechanical characteristics, microstructure, phase evolution, and density were assessed. The evolved microstructure of the sintered HEAs shows a homogenous dispersion of the alloying metals. The sintered microstructures showed a mixture of simple and complex phases. The phase refinement shows that the sintered HEAs exhibited a lower and the least grain size of 2.28 µm compared to the Ni50Al50 alloy having 8.26 µm. Likewise, a higher micro-strain value of 1.25E-1 was attained by the non-equal atomic HEA, while the unalloyed has 1.87E-3. The microhardness value of the sintered alloys varied from 103.5 HV to 139.2 HV, while their measured density varied from 5.23 g/cm3 to 6.44 g/cm3.

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“…Due to the difficulty in producing complicated shapes, the SPS procedures have unquestionably been shown to be an excellent powder metallurgy (PM) strategy to generating nanostructured ultrafine-grained materials. It produces extremely dense, exceptionally well-bonded solid materials that resist grain coarsening [ 53 ]. By using this method, solid bulk materials might be better consolidated at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

Olorundaisi,

Babalola,

Teffo

et al. 2023

Discover Nano

Self Cite

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The effect of mechanical alloying on the development of Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys (HEAs) utilizing the spark plasma sintering (SPS) method is the main goal of this study. A bulk sample was fabricated using SPS after the alloys were mixed for 12 h. Thermodynamic simulation, X-ray diffraction, scanning electron microscopy, nanoindentation, and microhardness were used to investigate the microstructure and mechanical properties of the as-mixed powders. The master alloy was made of NiAl and was subsequently alloyed with Ti, Mn, Co, Fe, and Cr at different compositions to develop HEAs at a sintering temperature of 850 °C, a heating rate of 100 °C/min, a pressure of 50 MPa, and a dwelling time of 5 min. A uniform dispersion of the alloying material can be seen in the microstructure of the sintered HEAs with different weight elements. The grain size analysis shows that the Ni25Al25Ti8Mn8Co15Fe14Cr5 alloy exhibited a refined structure with a grain size of 2.36 ± 0.27 µm compared to a coarser grain size of 8.26 ± 0.43 μm attained by the NiAl master alloy. Similarly, the HEAs with the highest alloying content had a greater microstrain value of 0.0449 ± 0.0036, whereas the unalloyed NiAl had 0.00187 ± 0.0005. Maximum microhardness of 139 ± 0.8 HV, nanohardness of 18.8 ± 0.36 GPa, elastic modulus of 207.5 ± 1.65 GPa, elastic recovery (We/Wt) of 0.556 ± 0.035, elastic strain to failure (H/Er) of 0.09.06 ± 0.0027, yield pressure (H3/$$E_{{\text{r}}}^{2}$$ E r 2 ) of 0.154 ± 0.0055 GPa, and the least plasticity index (Wp/Wt) of 0.444 ± 0.039 were attained by Ni25Al25Ti8Mn8Co15Fe14Cr5. A steady movement to the left may be seen in the load–displacement curve. Increased resistance to indentation by the developed HEAs was made possible by the increase in alloying metals, which ultimately led to higher nanohardness and elastic modulus.

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The spark plasma sintering of the optimized parametric process for the magnesium alloy reinforced hybrid nano-ceramics

Cited by 4 publications

References 55 publications

Optimization of process parameters for the development of Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy system via spark plasma sintering

Optimization of process parameters for the development of Ni–Al-Ti-Mn-Co-Fe–Cr high entropy alloy system via spark plasma sintering

Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

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