Microstructure and properties of AIN matrix composites produced by the directed nitridation of molten aluminum

1994 ◽  
Vol 13 (4) ◽  
pp. 293-296 ◽  
Author(s):  
M. K. Aghajanian ◽  
J. P. Biel ◽  
R. G. Smith ◽  
C. R. Kennedy
Keyword(s):  
Molten Aluminum ◽  
Matrix Composites ◽  
Microstructure And Properties

Microstructure and Properties of Ceramic Matrix Composites in the System Si3N4–SiCf

2013 ◽  
Vol 54 (3) ◽  
pp. 196-202 ◽  
Author(s):  
L. A. Plyasunkova ◽  
I. Yu. Kelina ◽  
L. A. Chevykalova
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Microstructure And Properties

The effect of siloxane spin-on-glass and reaction bonded silicon oxycarbide coatings with a self-propagating interfacial reaction treatment (ASPIRE) in the synthesis of carbon/graphite fiber-reinforced aluminum metal matrix composites

1993 ◽  
Vol 8 (12) ◽  
pp. 3192-3201 ◽  
Author(s):  
Willy M. Balaba ◽  
Douglas A. Weirauch ◽  
Anthony J. Perrotta ◽  
George H. Armstrong ◽  
Princewill N. Anyalebechi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Metal Matrix ◽  
Molten Aluminum ◽  
Silicon Oxycarbide ◽  
Matrix Composites ◽  
X Ray ◽  
Aluminum Metal ◽  
Silicon Based ◽  
Aluminum Metal Matrix Composites

Carbon fibers were treated with siloxane spin-on-glass and reaction bonded silicon oxycarbide coatings. The spin-on-glass (SOG) coatings were prepared by pyrolyzing solutions of polymethylsilsesquioxane (PMSO), polydimethoxysilane (PDSO), and poly(ethoxysilane)ethyltitanate copolymer (ESET). Since the flexibility of the coatings was found to be dependent on the concentration of the siloxane solution, only those of PMSO and PDSO below 1.25% were determined to be suitable for fiber coatings, and an alternative approach to the formation of a pliable silicon-based ceramic coating on the fibers was developed. Carbon fiber tows were impregnated by ethanolic solutions of organosilicon chlorides and fired at temperatures up to 900 °C to form a flexible reaction bonded silicon oxycarbide (RB–SiOC) coatings. Uncoated, SOG coated, and RB–SiOC coated carbon fibers were embedded in aluminum metal at 1000 °C. While both silica-based coatings protected the carbon surface, no wetting was observed, leading to fiber pull-out. When the coated fibers were treated with a mixture of Ti and B prior to immersion into the molten aluminum, complete wetting of the fibers occurred. In the presence of molten aluminum, the Ti/B coating enabled the exothermic formation of TiB2 and titanium aluminides, which facilitate wetting. This reaction is termed ASPIRE (Aluminum Self-Propagating Interfacial Reaction) and in combination with silicon-based ceramic coatings provides a scientific approach to the formation of stable carbon fiber/aluminum metal-matrix composites. The coated fibers and composites were characterized by scanning electron microscopy (SEM) with energy dispersive x-ray (EDX) analysis, and x-ray photoelectron spectroscopy (XPS).

scholarly journals Structure and Properties of Layered Ti-6Al-4V-Based Materials Fabricated Using Blended Elemental Powder Metallurgy

2020 ◽  
Vol 321 ◽  
pp. 11028
Author(s):  
S.V. Prikhodko ◽  
O.M. Ivasishin ◽  
P.E. Markovsky ◽  
D.G. Savvakin ◽  
O.O. Stasiuk
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Hardness ◽  
Layered Structures ◽  
Elemental Powder ◽  
Matrix Composites ◽  
Microstructure And Properties ◽  
Blended Elemental ◽  
Low Weight

Due to the high specific strength of Ti, materials on its base are indispensable when high-strength and low-weight requests are a chief demand from the industry. Reinforcement of Ti-alloys with hard and light particles of TiC and TiB is a credible pathway to make metal matrix composites (MMC) with enhanced elastic moduli without compromising the material’s low-weight. However, reinforcement of the alloy with hard particles inevitably lowers the value of toughness and plasticity of material. Yet, in many applications simultaneous high hardness and high plasticity are not required through the entire structure. For instance, parts that need enhanced wear resistance or resistance upon ballistic impact demand high hardness and strength at the surface, whereas their core necessitates rather high toughness and ductility. Such combination of mechanical properties can be achieved on layered structures joining two and more layers of different materials with different chemical composition and/or microstructure within each individual layer. Multi-layered structures of Ti-6Al-4V alloy and its metal-matrix composites (MMC) with 5 and10% (vol.) of TiC and TiB were fabricated in this study using blended elemental powder metallurgy (BEPM) of hydrogenated Ti. Post-sintering hot deformation and annealing were sometimes also employed to improve the microstructure and properties. Structure of materials were characterized using light optical microscopy, scanning electron microscopy, electron backscattered diffraction, x-ray microscopy, tensile and 3-point flexural tests. The effect of various fabrication parameters was investigated to achieve desirable microstructure and properties of layered materials. Using optimized processing parameters, relatively large multilayered plates were made via BEPM and demonstrate superior anti-ballistic performance compared to the equally sized uniform Ti-6Al-4V plates fabricated by traditional ingot and wrought technology.

Effects of (TiB2 + ZrB2) nanoparticles on microstructure and properties of 7055Al matrix composites

2018 ◽  
Vol 34 (11) ◽  
pp. 1323-1332 ◽  
Author(s):  
Yonggang Yang ◽  
Yutao Zhao ◽  
Xizhou Kai ◽  
Ran Tao ◽  
Min Wang ◽  
...  
Keyword(s):  
Matrix Composites ◽  
Microstructure And Properties ◽  
Zrb2 Nanoparticles

Microstructure and properties of metallurgical bonding Mo/Pt/Ag laminated metal matrix composites

2019 ◽  
Vol 743 ◽  
pp. 675-683 ◽  
Author(s):  
Jinlong Du ◽  
Xingyu Chen ◽  
Xiaogang Jia ◽  
Yuan Huang ◽  
Zumin Wang ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Microstructure And Properties ◽  
Metallurgical Bonding ◽  
Bonding Mo

Effects of graphene content on the microstructure and properties of copper matrix composites

Carbon ◽  
2016 ◽  
Vol 96 ◽  
pp. 836-842 ◽  
Author(s):  
Fanyan Chen ◽  
Jiamin Ying ◽  
Yifei Wang ◽  
Shiyu Du ◽  
Zhaoping Liu ◽  
...  
Keyword(s):  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Microstructure And Properties ◽  
Graphene Content
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