Assessment of AlN/Mg–8Al Composites Reinforced with In Situ and/or Ex Situ AlN Particles

Tong Gao; Zengqiang Li; Kaiqi Hu; Yihan Bian; Xiangfa Liu

doi:10.3390/ma14010052

Assessment of AlN/Mg–8Al Composites Reinforced with In Situ and/or Ex Situ AlN Particles

Materials ◽

10.3390/ma14010052 ◽

2020 ◽

Vol 14 (1) ◽

pp. 52

Author(s):

Tong Gao ◽

Zengqiang Li ◽

Kaiqi Hu ◽

Yihan Bian ◽

Xiangfa Liu

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Ex Situ ◽

Prepared Composite ◽

Particle Chains

In this paper, 8.2AlN/Mg–8Al composites reinforced with in situ and/or ex situ AlN particles have been synthesized. The in situ-formed AlN particles are nano-sized, performing as particle chains. It has been clarified that the in situ AlN particles are more efficient than ex situ particles for the enhancement of mechanical properties. The in situ-prepared composite exhibits improved density, hardness and compressive strength compared to the ex situ ones. This work may be referred to for designing particle-reinforced Mg composites by various methods.

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Microstructural and Mechanical Properties of Al-Based Composites Reinforced with In-Situ and Ex-Situ Al2O3Nanoparticles

Advanced Engineering Materials ◽

10.1002/adem.201500297 ◽

2015 ◽

Vol 18 (4) ◽

pp. 550-558 ◽

Cited By ~ 11

Author(s):

Riccardo Casati ◽

Alberto Fabrizi ◽

Giulio Timelli ◽

Ausonio Tuissi ◽

Maurizio Vedani

Keyword(s):

Mechanical Properties ◽

Ex Situ

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Correlation between the Enhanced Plasticity of Glassy Matrix Composites and the Volume Fraction, Size and Intrinsic Mechanical Property of Reinforcements

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.1967 ◽

2014 ◽

Vol 783-786 ◽

pp. 1967-1970

Author(s):

Z.H. Chu ◽

Hidemi Kato ◽

Guo Qiang Xie ◽

D.R. Yan ◽

Guang Yin Yuan

Keyword(s):

Mechanical Properties ◽

Metallic Glasses ◽

Volume Fraction ◽

Shear Bands ◽

Ex Situ ◽

Glassy Matrix ◽

Matrix Composites ◽

Micro Scale ◽

Fraction Size

In recent years, bulk metallic glasses (BMGs) have received considerable attention due to their unique mechanical properties. However, the deformation of BMGs is highly localized in a few shear bands so that many of them exhibit poor plasticity. As such, more and more researchers have focused on improving the plasticity by in-situ or ex-situ introducing of nanoor micro-scale crystalline phases into the metallic glassy matrix in order to formation of multiple shear bands.

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Effect of the Ratio of Silica Source on Ultra-Light Calcium Silicate Material In Situ Strengthened with Xonotlite Whiskers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.648.131 ◽

2013 ◽

Vol 648 ◽

pp. 131-134 ◽

Cited By ~ 1

Author(s):

Fei Liu ◽

Ting Li ◽

Xiao Dan Wang ◽

Jian Xin Cao

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Hydrothermal Synthesis ◽

Flexural Strength ◽

Calcium Silicate ◽

In Situ Growth ◽

Silicate Material ◽

Silica Source ◽

Microstructure And Mechanical Properties

The ultra-light calcium silicate material was reinforced with the method of xonotlite whisker in-situ growth via hydrothermal synthesis. Effects of different ratios of silica sources on microstructure and mechanical properties of the reinforcement were studied in this paper. The results indicated that the ratios of silica sources posed great impacts on microstructure and mechanical properties of the reinforcement. The reinforcement with density of 118 Kg•m-3, flexural strength of 0.42 MPa and compressive strength of 0.66 MPa was successfully prepared under the condition of K2SiO3:H2SiO3 (mol) =2:1.

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Neutron Imaging Investigations of the Hydrogen Related Degradation of the Mechanical Properties of Zircaloy-4 Cladding Tubes

MRS Proceedings ◽

10.1557/opl.2013.364 ◽

2013 ◽

Vol 1528 ◽

Cited By ~ 2

Author(s):

M. Grosse ◽

S. Valance ◽

J. Stuckert ◽

M. Steinbrueck ◽

M. Walter ◽

...

Keyword(s):

Mechanical Properties ◽

Oxide Layer ◽

Zirconium Alloys ◽

Hydrogen Uptake ◽

Mechanical Tests ◽

Neutron Imaging ◽

Ex Situ ◽

Loss Of Coolant Accident ◽

Local Enrichment

ABSTRACTThe hydrogen uptake and redistribution in Zircaloy-4 specimens applied to loss of coolant accident (LOCA) simulation experiments and in mechanical pre-loaded samples were investigated by means of ex-situ and in-situ neutron imaging. The results of these investigations were compared with results from mechanical tests. Hydrogen absorption may have a strong influence on the mechanical properties of zirconium alloys. A local enrichment of the absorbed hydrogen may result in brittle fracture at these positions in the tensile test. On the other hand, stress fields in the material affect the hydrogen uptake as well as its distribution in the material. In-situ investigations confirmed the existence of an initial oxide layer formed at room temperature by contact with air. This oxide layer suppresses the hydrogen uptake until dissolution in the zirconium matrix.

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Review of the Recent Development in Metallic Glass and Its Composites

Metals ◽

10.3390/met11121933 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1933

Author(s):

Adit Sharma ◽

Vladislav Zadorozhnyy

Keyword(s):

Mechanical Properties ◽

Metallic Glass ◽

Metallic Glasses ◽

Review Paper ◽

Ex Situ ◽

Second Phase ◽

Glass Composites ◽

Recent Developments ◽

Thermo Physical Properties

Metallic glasses are known for their mechanical properties but lack plasticity. This could be prevented by combining them with other materials or by inducing a second phase to form a composite. These composites have enhanced thermo-physical properties. The review paper aims to outline a summary of the current research done on metallic glass and its composites. A background in the history, properties, and their applications is discussed. Recent developments in biocompatible metallic glass composites, fiber-reinforced metallic glass, ex situ and in situ, are discussed.

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Mechanical Properties of Biomimetic Composites for Bone Tissue Engineering

MRS Proceedings ◽

10.1557/proc-844-y6.2 ◽

2004 ◽

Vol 844 ◽

Cited By ~ 1

Author(s):

Devendra Verma ◽

Kalpana S. Katti ◽

Bedabibhas Mohanty

Keyword(s):

Mechanical Properties ◽

Tissue Engineering ◽

Elastic Modulus ◽

Bone Tissue Engineering ◽

Bone Tissue ◽

Mechanical Response ◽

Structural Disorder ◽

Ex Situ ◽

Porous Composites

ABSTRACTA biomimetic process involving in situ mineralization of hydroxyapatite (HAP) is used to design new composite biomaterials for bone tissue engineering. Surface and bulk properties of HAP composites have been studied for hydroxyapatite mineralized in absence (ex situ) of polyacrylic acid (PAAc) and in presence (in situ) of PAAc. XRD studies show existence of structural disorder within in situ HAP. It has been observed that PAAc increases the rate of crystallization. FTIR studies indicate calcium deficiency in structure of both in situ and ex situ HAP. PAAc provides favorable sites for nucleation of HAP. During crystallization of HAP, PAAc dissociates to form carboxylate ion, which binds to HAP. Porous and solid composites of in situ and ex situ HAP with polycaprolactone (PCL) in 50:50 ratio have been made to evaluate their applicability as bone scaffold. Mechanical tests on solid samples indicate ex situ HAP/PCL composites have higher elastic modulus (1.16 GPa) than in situ HAP/PCL composites (0.82 GPa). However, in case of porous composites, in situ HAP/PCL composites are found to have higher elastic modulus (29.5 MPa) than ex situ HAP/PCL composites (10.4 MPa). Nanoindentation tests were also performed at different loads to evaluate mechanical properties of the composites. In situ HAP mineralized using non-degradable polymers has thus been shown to improve mechanical response in porous composites.

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Investigation of mechanical properties and biocorrosion behavior of in situ and ex situ Mg composite for orthopedic implants

Materials Science and Engineering C ◽

10.1016/j.msec.2020.110974 ◽

2020 ◽

Vol 113 ◽

pp. 110974

Author(s):

Morteza Tayebi ◽

Davood Bizari ◽

Zabihollah Hassanzade

Keyword(s):

Mechanical Properties ◽

Orthopedic Implants ◽

Ex Situ

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Combined Calorimetry, Thermo-Mechanical Analysis and Tensile Test on Welded EN AW-6082 Joints

Materials ◽

10.3390/ma11081396 ◽

2018 ◽

Vol 11 (8) ◽

pp. 1396 ◽

Cited By ~ 3

Author(s):

Philipp Wiechmann ◽

Hannes Panwitt ◽

Horst Heyer ◽

Michael Reich ◽

Manuela Sander ◽

...

Keyword(s):

Mechanical Properties ◽

Welded Joints ◽

Thermal Analyses ◽

Mechanical Analysis ◽

Image Correlation ◽

Ex Situ ◽

Compression Tests ◽

Depth Analysis ◽

Welding Processes

Wide softening zones are typical for welded joints of age hardened aluminium alloys. In this study, the microstructure evolution and distribution of mechanical properties resulting from welding processes of the aluminium alloy EN AW-6082 (AlSi1MgMn) was analysed by both in-situ and ex-situ investigations. The in-situ thermal analyses included differential scanning calorimetry (DSC), which was used to characterise the dissolution and precipitation behaviour in the heat affected zone (HAZ) of welded joints. Thermo-mechanical analysis (TMA) by means of compression tests was used to determine the mechanical properties of various states of the microstructure after the welding heat input. The necessary temperature–time courses in the HAZ for these methods were measured using thermocouples during welding. Additionally, ex-situ tensile tests were done both on specimens from the fusion zone and on welded joints, and their in-depth analysis with digital image correlation (DIC) accompanied by finite element simulations serve for the description of flow curves in different areas of the weld. The combination of these methods and the discussion of their results make an essential contribution to understand the influence of welding heat on the material properties, particularly on the softening behaviour. Furthermore, the distributed strength characteristic of the welded connections is required for an applicable estimation of the load-bearing capacity of welded aluminium structures by numerical methods.

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Characterization of Iron-Matrix Composites Reinforced by In Situ TiC and Ex Situ WC Fabricated by Casting

Metals ◽

10.3390/met11060862 ◽

2021 ◽

Vol 11 (6) ◽

pp. 862

Author(s):

Aida B. Moreira ◽

Laura M. M. Ribeiro ◽

Pedro Lacerda ◽

Manuel F. Vieira

Keyword(s):

Mechanical Properties ◽

Base Metal ◽

Microstructural Analysis ◽

Base Material ◽

Ex Situ ◽

Homogeneous Distribution ◽

Matrix Composites ◽

Iron Matrix ◽

In Situ Tic

In this study, the effect of microstructural characteristics on the mechanical properties of high-chromium white cast iron-matrix composites reinforced by in situ TiC and ex situ WC was investigated. To this end, two different powder mixtures (Ti + Al + graphite and WC + Fe) were compressed to produce green compacts that were inserted into the mold, before casting. The microstructure of the resulting composites and the base metal was characterized using optical microscopy (OM) and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). The microstructural analysis revealed a sound bonding between the composite zone and the base metal. The reinforcement with WC particles showed a homogeneous distribution of the carbide particles, unlike the reinforcement with TiC particles. The mechanical properties of the reinforcements were evaluated using hardness and ball-cratering micro-abrasion tests. The results showed that both reinforcements increase the hardness and wear performance of the base material, which was the best performance achieved by the reinforcement with WC particles.

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