Structure, strength and fracture of hot-pressed Al-Cr, Al-Cr-Si powder composites

Прибытков, Г. А.; Коржова, В. В.; Савицкий, А. П.

doi:10.1063/1.4898994

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are a few pores concentrated mainly near the "inclusion-aluminum" interface. No other phase inclusions were found in the metallographic study [20]. According to X-ray diffraction patterns (Figure 3 c,d), only the Al, Cr, and Si reflections were present.…”

Section: Resultsmentioning

confidence: 84%

“…Powder technology is a suitable method of producing multicomponent cathodes based on Al-Cr and Al-Cr-Si, but a simple sintering mode is not convenient because of uncontrolled volume effects with a large increase in the porosity of aluminum powder alloys [19]. Hot consolidation of powder mixtures containing aluminum at temperatures below the beginning of active diffusion interaction of aluminum and chromium is one more promising method for the production of powder cathode material [20]. Such diffusion interaction leads to the brittle intermetallic compound's formation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the Hot Deformation Conditions on Structure and Mechanical Properties of AlCr/AlCrSi Powder Composites

Коростелева

Прибытков

Коржова

2021

Metals

Self Cite

View full text Add to dashboard Cite

Aluminum matrix composites usually contain strengthening particles of refractory compounds (SiC, Al2O3) that do not react with the Al matrix. There is a problem in producing the Al matrix composite with inclusion of metals that can generate intermetallic compounds with aluminum. In this case, a conventional sintering of powder mixtures results in high porosity due to volume growth. That is why some new methods of producing dense Al matrix composites are required. A possibility to create a dense powder Al-based composite containing hard components, such as chromium and silicon, without using the sintering process, is considered. This paper presents study results of structural and mechanical properties of Al-Cr and Al-Cr-Si composites produced by hot compaction of powder mixtures. An analysis of the relationship between mechanical properties and structures of Al-Cr and Al-Cr-Si composites is carried out. Optimal values for thermomechanical processing modes that ensure sufficient strength and plasticity are determined. It is shown that strong bonding of the aluminum particles occurs under hot deformation, and an aluminum matrix is formed that provides acceptable composite bending strength as a result. The presence of chromium and silicon hard inclusions is not a significant obstacle for aluminum plastic flow. Al-Cr and Al-Cr-Si composites produced by hot deformation of the powder mixtures can be used as cathode material for the deposition of wear-resistant nitride coatings on metalworking tools.

show abstract

Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Effect of the Hot Deformation Conditions on Structure and Mechanical Properties of AlCr/AlCrSi Powder Composites

Коростелева

Прибытков

Коржова

2021

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…One of the ways to reduce friction and wear is the development of new composite materials with good tribological properties. The main service characteristics of the antifriction materials are: low friction coefficient in conditions of imperfect lubrication, resistance to setting and seizure during friction, high wear resistance, thermal conductivity, resistance to compression and creep, fatigue strength, and resistance to corrosion [3].…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Al-Based Composites Reinforced with Fullerene Soot

et al. 2021

View full text Add to dashboard Cite

Aluminum-based composite materials reinforced with fullerene soot, which is a mixture of fullerene and amorphous carbon, are promising materials for friction and wear applications. Composite materials: aluminum with 2% fullerene soot (f.s) and Al with 2% f.s and 2% Cu were obtained via mechanical milling followed by hot pressing. The tribological properties (friction and wear) of the listed composites were investigated and compared with the results for pure aluminum obtained under similar conditions. It has been shown that the addition of fullerene soot reduces the friction coefficient by 25%. At additional alloying with copper, the friction coefficient decreased by 35% in comparison with pure aluminum and also lad to a decrease in friction fluctuations. The wear rate of composite Al with 2% f.s decreased twice in comparison with that of pure aluminum, and with additional alloying it decreased 2.5 times. The morphology of the wear surfaces was investigated by scanning electron microscopy (SEM). The influence of fullerene soot and additional alloying on the wear mechanism was shown.

show abstract

Structure and corrosion behaviour of CrxAl(Si)yC coatings fabricated by the vacuum arc discharge technique

et al. 2022

View full text Add to dashboard Cite

Structure, strength and fracture of hot-pressed Al-Cr, Al-Cr-Si powder composites

Cited by 3 publications

References 0 publications

Effect of the Hot Deformation Conditions on Structure and Mechanical Properties of AlCr/AlCrSi Powder Composites

Effect of the Hot Deformation Conditions on Structure and Mechanical Properties of AlCr/AlCrSi Powder Composites

Tribological Properties of Al-Based Composites Reinforced with Fullerene Soot

Structure and corrosion behaviour of CrxAl(Si)yC coatings fabricated by the vacuum arc discharge technique

Contact Info

Product

Resources

About