Effect of the Particle Size of Al/Ni Multilayer Powder on the Exothermic Characterization

Miyake, Shugo; Izumi, Taisei; Yamamoto, Rino

doi:10.3390/ma13194394

Cited by 4 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gas-phase synthesis includes physical/chemical deposition [ 12 ] and magnetron sputtering technique [ 13 ]. Solid-phase synthesis includes self-propagating high-temperature synthesis (SHS) [ 14 ], thermal explosion [ 15 ], hot gas extrusion [ 16 ], spark plasma sintering [ 17 ], rolling [ 18 , 19 ], hot isostatic pressing [ 20 ], mechanical alloying [ 21 ] and shock-wave loading (SWL) [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NiAl Intermetallic Compound under Shock-Wave Extrusion

et al. 2022

View full text Add to dashboard Cite

This paper presents the implementation of the first stage of a study on the synthesis of the intermetallic compound in the Ni-Al system under shock-wave extrusion (SWE). A method was developed and experiments involving SWE of the reactive Ni–Al powder mixture were carried out. As a result, it was possible to obtain up to 56 vol.% of the final product and achieve 100% synthesis of NiAl. The results of metallographic analysis indicate that the process of high-velocity collapse of the tube created conditions for the formation of a cumulative flow, which directly affects the phase formation in NiAl. It was shown that the presence of the central hole in the powder sample reduced the effect of the Mach stem on the homogeneity of the NiAl structure. It was also determined that with a central hole with a 5 mm diameter, the effect of the Mach stem could not be observed at all. The goals of further studies are achieving 90–100 vol.% of the final product and reducing the porosity in the final product. Preliminary experimental studies have shown great potential for SWE to produce composite metal–intermetallic materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis of NiAl Intermetallic Compound under Shock-Wave Extrusion

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In our study, to improve the productivity and convenience of the heat source, an Al/Ni multilayer powder fabricated by the coldrolling and frictional pulverizing methods was developed, and the thermal reaction characteristics were studied. 13,[25][26][27][28] In a previous study, we revealed that the exothermic reaction characteristics, such as the reaction speed and maximum exothermic reaction temperature, increase with an increase in the number of cold-rolling passes. 25) These characteristics can be controlled to some extent by changing the rolling conditions.…”

Section: Introductionmentioning

confidence: 99%

Microscale thermal characteristics of cold-rolled aluminum alloy using a thermoreflectance method

Yamashita

Miyake

2022

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

In this study, the microscale thermal propagation behavior of cold-rolled aluminum alloy sheets was characterized using a thermoreflectance (TR) method from the micro and macro perspectives, and the relationship between the crystallite sizes of cold-rolled aluminum sheets with different rolling reduction rates and their thermal propagation characteristics was described. The crystallite sizes were analyzed by X-ray diffraction using Scherrer’s equation. The microscale thermal propagation characteristics of these specimens were measured using a TR method with a high spatial resolution of several micrometers through a focused laser beam and by controlling the thermal diffusion length. The macroscale thermal propagation characteristics of these specimens were then measured using two methods: the spot periodic heating method and the electrical resistance measurement method with the Wiedemann–Franz law. Experimental results showed that the microscale thermal propagation correlated with a change in the crystallite size. However, the macroscale thermal conductivity decreased with an increase in the rolling reduction rate regardless of the crystallite size. It is expected that the thermal propagation characteristics at the microscale can be controlled by a change in the crystallite size.

show abstract

“…Since RSM components, as a rule, are powders, they must be consolidated. There are various technologies to consolidate RSMs into a monolithic structure: radial forging [1,6], cold and hot isostatic pressing [7,8], high-pressure torsion [9], magnetron sputtering [10] and cold spraying [11,12], cold rolling [13,14], accumulative roll-bonding [15], and explosive compacting [5,16]. The disadvantages of sputtering are its low rate and high cost.…”

Section: Introductionmentioning

confidence: 99%

Reactive Ni–Al-Based Materials: Strength and Combustion Behavior

Seropyan

Saikov

Андреев

et al. 2021

Metals

View full text Add to dashboard Cite

The effect of PTFE, continuous boron, and tungsten fibers on the combustion behavior and strength of reactive Ni–Al compacts was examined in this study. The introduction of continuous fibers into Ni–Al compacts according to the developed scheme was found to increase the flexural strength from 12 to 120 MPa. Heat treatment (HT), leading to chemical interaction of the starting components, increases the strength of compacts at temperatures not exceeding 550 °C. The combination of reinforcement and HT significantly increases the strength without reducing reactivity. Experimental results showed that strength and combustion rate increase with the reduction in PTFE to 1 wt % in Ni–Al compacts. A favorable effect of the addition of PTFE from 5 to 10 wt % on the reduction of the threshold for the shock-wave initiation of reactions in Ni–Al was established. The obtained results can be used to produce reactive materials with high mechanical and energy characteristics.

show abstract

Effect of the Particle Size of Al/Ni Multilayer Powder on the Exothermic Characterization

Cited by 4 publications

References 32 publications

Synthesis of NiAl Intermetallic Compound under Shock-Wave Extrusion

Synthesis of NiAl Intermetallic Compound under Shock-Wave Extrusion

Microscale thermal characteristics of cold-rolled aluminum alloy using a thermoreflectance method

Reactive Ni–Al-Based Materials: Strength and Combustion Behavior

Contact Info

Product

Resources

About