Effect of Sintering Parameters on the Microstructure and Mechanical Properties of Medical Mg–3Mn and Mg–3Zn Prepared by Powder Metallurgy

Luo, Xianfu; Fang, Chaoyang; Yao, Fanjin; Zhang, Hong; Yan, Shuai

doi:10.1007/s12666-019-01651-x

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…It is well known that the harness plays an important role in various industries . Here, we focus on the influence of alloying elements on the Vickers hardness and elastic modulus of ZrB 12 .…”

Section: Resultsmentioning

confidence: 99%

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Pan

Lin

2020

Int J of Quantum Chemistry

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Although ZrB 12 is a promising advanced material because of the boron cuboctahedron cages, the hardness of ZrB 12 remains controversy. Here, we apply first-principles calculations to study the influence of transition metals (4d-and 5d-) on the hardness and thermodynamic properties of ZrB 12 . The calculated hardness of ZrB 12 is 32.9 GPa, which is in good agreement with the previous theoretical result. Importantly, the calculated hardness of Re-doped ZrB 12 is up to 40.0 GPa, which is a potential superhard material. The essential reason is that the alloying element of Re enhances the localized hybridization of B B and Zr B atoms, and then forms the strong B B covalent bond and Zr B bond. The result is well demonstrated by the chemical bonding and lattice parameter. Here, our work shows that the alloying elements of Nb, Mo, and Re enhance the thermodynamic properties of ZrB 12 . The Debye temperature of Re-doped ZrB 12 is 1225.2 K, which is larger than that of the parent ZrB 12 (1213.5 K). K E Y W O R D S borides, elastic modulus, first-principles calculations, hardness, thermodynamic properties, ZrB 12 1 | INTRODUCTION Hard and superhard materials (≥40 GPa) are very important industrial materials, which are widely used in various industrial applications because of their high hardness, ultracompressibility, high melting point, and excellent thermal stability etc. [1-10] In comparison to diamond and boron nitride (c-BN), the transition metal borides (TMBs) are attractive potential superhard materials because of the network and shorter covalent bonding such as B B covalent bond and TM B bond. [11][12][13][14][15][16][17][18][19] Diborides (TMB 2 ) and transition metal tetraborides (TMB 4 ) have been widely investigated over the last years. [20][21][22][23][24] However, the reported Vickers hardness of TMB 2 or TMB 4 is difficult to meet the requirement of superhard material. [25][26][27][28][29] Naturally, the Vickers hardness of TMBs mainly relies on the shorter and network covalent bonds. In other words, the high concentration of boron plays a crucial role in Vickers hardness of TMBs. Among these TMBs, it is obvious that the transition metal dodecaborides (TMB 12 ) are potential superhard materials in comparison to TMB 2 and TMB 4 .Recently, ZrB 12 has evoked great interest because of the high concentration of boron and the network B B covalent bonds. [30] This dodecaboride is composed of the boron cuboctahedron cage (24 atoms) and 12-coordinate transition metals at the center of cubic structure. This structural feature is possible to enhance the Vickers hardness of TMBs. However, the Vickers hardness of ZrB 12 remains controversy. Korozlu et al. have found that the calculated Vickers hardness of ZrB 12 is 40.1 GPa, which is believed to a potential superhard material. [31] However, the recent works have shown that the Vickers hardness of ZrB 12 is 35.4 GPa by Chen et al. [32] and 29.3 GPa by Li et al., [33] which are different from Korozlu's result. On the other hand, even if the Vickers hardness of ZrB 12 remains...

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Section: Resultsmentioning

confidence: 99%

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Pan

Lin

2020

Int J of Quantum Chemistry

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“…At 500 • C, all Zn powders (3 wt % and a melting point of 419 • C) melted and wet the surface of Mg, and CNF particles, promoting a liquid phase sintering mechanism where diffusion may happen between Mg, Zn, and CNF. Luo et al obtained the highest hardness of 74.3 Hv for Mg-3Zn alloy after being sintered at 560 • C [46]. Similarly, Burke et al measured the maximum hardness of 65 Hv for Mg after sintering at 500 • C due to the increasing kinetic diffusion between Mg particles [20].…”

Section: Analysis Of Mechanical Propertiesmentioning

confidence: 96%

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Tuminoh

Hermawan

Ramlee

2021

Metals

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To prevent a premature failure, absorbable magnesium implants must possess an adequate mechanical stability. Among many ways to improve the mechanical properties of magnesium is by particle reinforcement, such as using carbon nanofiber (CNF). This work reports an experimental design for optimum materials and processing of CNF-reinforced Mg–Zn composites based on a two-level factorial design. Four factors were analyzed: percentage of CNF, compaction pressure, sintering temperature, and sintering time, for three recorded responses: elastic modulus, hardness, and weight loss. Based on the two-level factorial design, mechanical properties and degradation resistance of the composites reach its optimum at a composition of 2 wt % CNF, 400 MPa of compaction pressure, and 500 °C of sintering temperature. The analysis of variance reveals a significant effect of all variables (p < 0.0500) except for the sintering time (p > 0.0500). The elastic modulus and hardness reach their highest values at 4685 MPa and 60 Hv, respectively. The minimum and maximum weight loss after three days of immersion in PBS are recorded at 54% and 100%, respectively. This work concludes the percentage of CNF, compaction pressure, and sintering temperature as the main factors affecting the optimum elastic modulus, hardness, and degradation resistance of CNF-reinforced Mg–Zn composites.

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“…The transportable capacity of a solid is estimated by the mechanical properties. [38][39][40][41] Unfortunately, the mechanical properties of TiH 2 are also unknown.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the transportable capacity also plays an important role in hydrogen storage materials. The transportable capacity of a solid is estimated by the mechanical properties . Unfortunately, the mechanical properties of TiH 2 are also unknown.…”

Section: Introductionmentioning

confidence: 99%

Exploring the novel structure, transportable capacity and thermodynamic properties of TiH ₂ hydrogen storage material

Pan

Chen

2020

Int J Energy Res

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Summary We apply the first‐principles calculations to study the structure, elastic modulus, Debye temperature and heat capacity of four TiH2. The results show that one new orthorhombic (Pnma) TiH2 is predicted. The tetragonal (I4mmm) TiH2 is more stable than the cubic (Fm‐3m) TiH2. Compared to MgH2, TiH2 shows the strong deformation resistance. TiH2 dihydrides exhibit the strong bulk modulus compared to MgH2. The electronic structure shows that the high elastic modulus of TiH2 is determined by the Ti‐H bonds. The Debye temperature of cubic (Fm‐3m) and tetragonal (I4mmm) TiH2 is larger than the orthorhombic TiH2. The heat capacity follows the order of orthorhombic > cubic > tetragonal.

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Effect of Sintering Parameters on the Microstructure and Mechanical Properties of Medical Mg–3Mn and Mg–3Zn Prepared by Powder Metallurgy

Cited by 15 publications

References 13 publications

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Exploring the novel structure, transportable capacity and thermodynamic properties of TiH ₂ hydrogen storage material

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Effect of Sintering Parameters on the Microstructure and Mechanical Properties of Medical Mg–3Mn and Mg–3Zn Prepared by Powder Metallurgy

Cited by 15 publications

References 13 publications

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB12ceramics from first‐principles calculations

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB12ceramics from first‐principles calculations

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Exploring the novel structure, transportable capacity and thermodynamic properties of TiH 2 hydrogen storage material

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Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Influence of alloying elements on the mechanical and thermodynamic properties of ZrB₁₂ceramics from first‐principles calculations

Exploring the novel structure, transportable capacity and thermodynamic properties of TiH ₂ hydrogen storage material