Effect of two-step heat treatment on the phase formation of MgAlB14

Sun, Yan–Hui; Zhang, P.X.; Liu, G.Q.; Xiong, Xiang; Yang, Feifei; Jiao, Gaofeng; Zhang, C.P.; Guo, Yan

doi:10.1016/j.matlet.2011.04.053

Cited by 12 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In combination with titanium diboride, materials based on AlMgB 14 demonstrate hardness reaching 46 GPa [ 2 ], which classifies AlMgB 14 –TiB 2 composite materials as superhard. As of yet, the main efforts of scientists have been directed at studying the influence of production methods (one-stage or two-stage sintering) and the composition of the initial mixture (ratio of initial elements, pre-reacted powders or mechanical mixture) on the structure, phase formation processes and properties of AlMgB 14 -based materials [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Today, it is traditionally considered that the best sintering methods for obtaining AlMgB 14 are spark plasma sintering and hot pressing of AlMgB 14 powder mixtures [ 2 , 14 , 15 , 16 , 17 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

et al. 2022

View full text Add to dashboard Cite

In this work, the structure, phase composition, hardness and tensile strength of the AlMgB14-based material obtained by spark plasma sintering (SPS) were investigated. According to the XRD results, the spark plasma sintered material contains 94 wt% AlMgB14 phase and 6 wt% spinel MgAl2O4. Analysis of the SEM images showed that the obtained AlMgB14 sample has a dense structure; the relative density of the sample is 98.6%. The average microhardness of the spark plasma sintered (SPSed) sample is 29 ± 0.88 GPa. According to the results of the Brazilian test, the tensile strength of AlMgB14 is 56 MPa. The fracture is characterized by a single straight tensile crack that divides the sample along the compression line into two halves. The type of fracture in the AlMgB14 sample can be characterized as a cleavage fracture due to crack growth occurring in accordance with the transcrystalline fracture. The tensile strength of the obtained material is in good agreement with the tensile strength of boride and oxide ceramics studied in other works.

show abstract

Section: Introductionmentioning

confidence: 99%

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The disadvantage of this method is insufficient consolidation of the powder mixture due to the occurrence of secondary chemical reactions and the release of by-products. The second group includes methods for production of bulk materials by a two-step method [ 13 , 14 ]. In this case, at the first stage, the initial powders are sintered in a high-temperature vacuum furnace, and then the obtained prereacted AlMgB 14 powder is consolidated (including with additives) by hot pressing or SPS.…”

Section: Introductionmentioning

confidence: 99%

On the Structure and Properties of AlMgB14-TiB2 Composites Obtained from SHS Powders by Spark Plasma Sintering

et al. 2021

View full text Add to dashboard Cite

AlMgB14-TiB2 composite materials were fabricated by self-propagating high-temperature synthesis (SHS) followed by spark plasma sintering of the obtained SHS products. It was found that, during the SHS, the AlMgB14 phase is formed at a donor (Ti + 2B) to acceptor (Al12Mg17-B) mass ratio of 3:7 and 4:6, respectively. The specimen sintered from the SHS powder with the donor:acceptor mass ratio of 5:5 at a temperature of 1470 °C has a uniform skeletal structure. The average hardness of the obtained specimen is 30.1 GPa.

show abstract

“…In work [11], AlMgB 14 was obtained by the twostage sintering method. In the first step, aluminum, magnesium, and boron were mixed in Al:Mg:B atomic ratio of 1:6:14 and pressed.…”

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

Effect of two-step heat treatment on the phase formation of MgAlB14

Cited by 12 publications

References 11 publications

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

On the Structure and Properties of AlMgB14-TiB2 Composites Obtained from SHS Powders by Spark Plasma Sintering

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

Contact Info

Product

Resources

About

Effect of two-step heat treatment on the phase formation of MgAlB14

Cited by 12 publications

References 11 publications

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

On the Tensile Strength of Spark Plasma Sintered AlMgB14 Ceramics

On the Structure and Properties of AlMgB14-TiB2 Composites Obtained from SHS Powders by Spark Plasma Sintering

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