Synthesis of AlMgB14: Influence of Mechanical Activation of Al–Mg–B Powder Mixture on Phase Composition of Sintered Materials

Zhukov, Ilya; Зиатдинов, М. Х.; Dubkova, Ya. A.; Nikitin, Pavel

doi:10.1007/s11182-018-1557-5

Cited by 11 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We found that the powder mixture contained Al and Ti phases both before and after mechanical activation. It should be noted that no reflections belonging to the boron phase were found in the XRD pattern, since amorphous boron powder is characterized by the presence of short-range order in the mutual arrangement of its atoms [ 29 ], which makes it impossible to classify it as a crystalline phase.…”

Section: Resultsmentioning

confidence: 99%

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

et al. 2022

View full text Add to dashboard Cite

In this study, we successfully obtained Al-TiB2 composite materials using self-propagating high-temperature synthesis and preliminary mechanical activation of the initial Al-(Ti + 2B) powder mixture with a high aluminum content (70 wt.%). We investigated the possibility of controlling the structure of synthesis products, in particular, the size and shape of ceramic particles. We examined the effects of the mechanical activation of the initial powder mixture on the structure and particle size of titanium diboride in the synthesis products. We proposed a mechanism of structure formation in the synthesis products obtained by SHS using the method of preliminary mechanical activation of the initial mixture. We found that mechanical activation for 60-180 s led to the formation of isolated TiB2 particles of prolate and irregular shape. The average particle size of TiB2 in the synthesis products was 0.77 (after 60 s of mechanical activation) and 1.5 µm (after 180 s of mechanical activation), respectively. An increase in the duration of mechanical activation to 900 s led to the formation of an island (skeletal) structure, in which there were interconnected aggregates and isolated particles of titanium diboride. The average size of these particles was 4.3 µm.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

et al. 2022

View full text Add to dashboard Cite

show abstract

“…According to the given XRD pattern, the phase composition of the obtained powder is represented by Al 12 Mg 17 intermetallic compound, the refined parameters of which differ slightly from the standard. In this case, the halo at small diffraction angles corresponds to the amorphous phase of boron [ 16 ]. However, the volume (V) of the refined Al 12 Mg 17 crystal lattice differs significantly from the reference value as its energy (E) increases, which may indicate deformations of the intermetallic lattice during mechanical activation and its interaction with boron.…”

Section: Resultsmentioning

confidence: 99%

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the Al12Mg17-B-Si Powder Mixtures

Nikitin¹,

Zhukov²,

Matveev³

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

In this work, composite materials were obtained by spark plasma sintering of an Al12Mg17-B-Si powder mixture. The structure, phase composition, and mechanical properties of the obtained composites were studied. It was found that various compounds based on B12 icosahedrons, such as AlB12, B4Si, and B6Si, are formed during spark plasma sintering. Based on the SEM images and results of XRD analysis of the obtained specimens, a probable scheme for the formation of the phase composition of composite materials during spark plasma sintering was proposed. An increase in the Al12Mg17-B powder content in the initial mixture from 30 to 70 wt% leads to an increase in hardness from 16.55 to 21.24 GPa and a decrease in the friction coefficient and wear rate from 0.56 to 0.32 and 13.60 to 5.60 10−5 mm−3/(N/m), respectively.

show abstract

“…Materials based on AlMgB 14 can be used as thin wear-resistant coatings for contact surfaces of components. Today studies have been conducted on the structure of BAM, physical and mechanical properties in various compounds [4][5][6]. The possibility of deposition coatings based on AlMgB 14 on steel surfaces [7][8] and glass surfaces [9] is being actively studied.…”

Section: Introductionmentioning

confidence: 99%

“…The powders of aluminum, magnesium and boron were mixed in an atomic ratio of 1:1:14, milled and sintered using hot pressing in the temperature range from 1300 to 1500 °C.On the basis of the conducted studies, it was found that during hot pressing the phases AlMgB 14 and MgAl 2 O 4 are formed.The obtained material had a density of 2.54 g/cm 3 and a hardness of 32-35 GPa.Studies on the variation of the raw powder mixtures showed that the addition of 30 wt. % TiB 2 allows to increase the hardness of materials based on AlMgB 14 up to 46 GPa [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of AlMgB₁₄: Effect of modes of mechanical activation of the raw powders on the properties of obtained materials

2019

View full text Add to dashboard Cite

In work studies of phase composition, hardness and density of materials based on AlMgB14 synthesized by hot pressing method at temperatures of 1300 and 1400 °C under pressure 50 MPa from aluminum, magnesium and boron powders (E1 mixture), as well as from original powder of aluminum-magnesium alloy (E2 mixture) were conducted. AlMgB14 phase content of obtained bulk samples is ~ 95 wt. %. The maximum hardness of 14GPa and density of 2.1 g/cm3, respectively, has a sample, marked as E1, synthesized at a temperature of 1400 °C.

show abstract

Synthesis of AlMgB14: Influence of Mechanical Activation of Al–Mg–B Powder Mixture on Phase Composition of Sintered Materials

Cited by 11 publications

References 1 publication

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the Al12Mg17-B-Si Powder Mixtures

Synthesis of AlMgB₁₄: Effect of modes of mechanical activation of the raw powders on the properties of obtained materials

Contact Info

Product

Resources

About

Synthesis of AlMgB14: Influence of Mechanical Activation of Al–Mg–B Powder Mixture on Phase Composition of Sintered Materials

Cited by 11 publications

References 1 publication

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

Effect of Mechanical Activation of Al-Ti-B Powder Mixture on Phase Composition and Structure of Al-TiB2 Composite Materials Obtained by Self-Propagating High-Temperature Synthesis (SHS)

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the Al12Mg17-B-Si Powder Mixtures

Synthesis of AlMgB14: Effect of modes of mechanical activation of the raw powders on the properties of obtained materials

Contact Info

Product

Resources

About

Synthesis of AlMgB₁₄: Effect of modes of mechanical activation of the raw powders on the properties of obtained materials