Reinforcement Considerations for High Temperature Metal Matrix Composites

Successful metallurgical design of metal-matrix-composites relies on the knowledge of the intrinsic property profiles of the metal matrix and especially the compounds employed for particles, whiskers or fibres. In this work we compiled the key properties melting point, bulk modulus, shear modulus, Young׳s modulus, density, hardness, Poisson׳s ratio and structure/space group from the widespread literature data for the most relevant compound types, i.e. borides, carbo-borides, carbides, oxides, nitrides and intermetallic phases.

show abstract

“…rhom.[40] NbO 1937[7] NbO 2 1902[7] Nb 2 O 3 1772[40]134.1[50] Nb 2 O 5 1510[40]5.98[40]7.3[40]rhom.[40]1512[7]…”

Section: Datamentioning

confidence: 99%

“…monoclinic [40] 1470 [7] Y 2 0 3 2450 [20] 148.9+-3 69.2+-2 [51] 2.15 179.8+-4.8 [51] 5.02 [51] 34.1 - 41.0 6.8 [40] 0.299 [51] cubic [40] 135.7 66.5 [39] 2.04 171.5 [39] 5.03 [39] 0.298 [39] 141.5 ⁎ [39] 180 [20] 4.5 [20] …”

Section: Datamentioning

confidence: 99%

Properties of particle phases for metal-matrix-composite design

Baron

Springer

2017

Data in Brief

View full text Add to dashboard Cite

show abstract

“…In general, MMCs reinforced with particulates show high stiffness, low density, high hardness, adequate toughness and high wear resistant [6]. The most widely used particulate is either SiC or Al 2 O 3 , but others (TiB 2 , B 4 C, SiO 2 , TiC, WC, BN, ZrO 2 , W etc) have also been investigated [7]. SiC particles are the most common discontinuous reinforcements in aluminum matrix composites.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, there is no universally accepted model showing how different reinforcement shapes and sizes interact with various matrix to achieve optimum performance, especially for the case of toughening a hard matrix (ceramic and intermetallic toughening). The toughness of composites is controlled by complex interaction between properties of constituents and processing route [7].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Alumina Particle Size on Sintered Density and Hardness of Discontinuous Reinforced Aluminum Metal Matrix Composite

Ahmad¹,

Jamaluddin²,

Hussain³

et al. 2012

Jurnal Teknologi

View full text Add to dashboard Cite

Kertas kerja ini melaporkan kesan saiz partikel alumina (Al2O3) terhadap sifatâ€“sifat komposit matriks logam aluminium (KML) difabrikasi melalui kaedah metalurgi serbuk. Serbuk campuran dipadatkan pada tekanan 250 MPa dan disinter pada suhu 600Â°C selama 5 jam. Sampel KML dihasilkan berdasarkan 10% berat Al2O3. Artikel ini akan membincangkan kesan saiz partikel alumina terhadap mikrostruktur, ketumpatan jasad sinter dan kekerasan komposit. Ketumpatan komposit yang telah disinter adalah dalam julat 2.78 gcmâ€“3 hingga 2.84 gcmâ€“3. Kesan saiz partikel Al2O3 (0.3 Î¼m, 1.0 Î¼m, 3.0 Î¼m, 12.5 Î¼m dan 25.0 Î¼m) ke atas mikrostruktur komposit diperhatikan menggunakan Mikroskop Imbasan Elektron. Nilai kekerasan diukur menggunakan penguji mirokekerasan Vickers. Pemerhatian menunjukkan bahawa partikel penguat halus (0.3 Î¼m) memberikan nilai kekerasan yang tertinggi (70.1 Hv). Partikel alumina yang halus akan mewujudkan penghalang terhadap kehelan yang lebih efisien di dalam komposit aluminium. Komposit yang diperkuat dengan saiz partikel yang kecil mempunyai bilangan penghalang per unit isipadu yang tinggi berbanding dengan komposit yang diperkuat dengan partikel yang bersaiz besar pada peratus berat penguat yang sama. Kata kunci: Komposit matriks logam, matriks aluminium, alumina, saiz partikel, metalurgi serbuk This paper reports the effect of alumina (Al2O3) particle size on the properties of aluminum metal matrix composite (MMC), fabricated via powder metallurgy route. Mixture powders were compacted at 250 MPa and sintered at 600Â°C for 5 hours. The MMC samples were prepared based on 10 wt% of Al2O3. This paper will discuss the effect of alumina particle size on microstructure, sintered density and hardness of the composite. The densities of sintered composites were in the range of 2.78 gcmâ€“3 to 2.84 gcmâ€“3. The effect of Al2O3 particles sizes (0.3 Î¼m, 1.0 Î¼m, 3.0 Î¼m, 12.5 Î¼m and 25.0 Î¼m) on the microstructure of the composites were observed using Scanning Electron Microscope (SEM). The hardness value was measured using Vickers microhardness tester. It is observed that the finest reinforcement particle size (0.3 Î¼m) gave the highest hardness value (70.1 Hv). The finer Al2O3 particles will provide more efficient barriers to dislocation flow in aluminum matrix. Composites reinforced with the smallest particle size have higher number of barriers per unit volume compared with composites reinforced with larger particle size at the same weight percentage. Key words: Metal matrix composite, aluminum matrix, alumina, particle size, powder metallurgy

show abstract

Solidification of Metal Matrix Composites

Stefanescu

2015

Science and Engineering of Casting Solidification

View full text Add to dashboard Cite

Reinforcement Considerations for High Temperature Metal Matrix Composites

Cited by 7 publications

References 0 publications

Properties of particle phases for metal-matrix-composite design

Properties of particle phases for metal-matrix-composite design

The Influence of Alumina Particle Size on Sintered Density and Hardness of Discontinuous Reinforced Aluminum Metal Matrix Composite

Solidification of Metal Matrix Composites

Contact Info

Product

Resources

About