Control of Mechanical Properties of Functionally Graded Dual-Nanoparticle-Reinforced Composites

2018 ◽  
Vol 941 ◽  
pp. 2037-2040
Author(s):  
Han Sang Kwon ◽  
Je Hong Park ◽  
Kwon Hoo Kim ◽  
Marc Leparoux ◽  
Jean Francois Silvain ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Characteristics ◽  
Functionally Graded ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Layered Composites ◽  
Graded Materials ◽  
Al Matrix Composites ◽  
Al Matrix Composite ◽  
Al Matrix

Functionally graded aluminium (Al) matrix composite materials reinforced with carbon nanotubes (CNT) and silicon carbide nanoparticles (nSiC) or nanodiamond (nD) were fabricated using a powder-metallurgical route. The nSiC and nD were not only used as a reinforcement but also as an active solid mixing agent for dispersing the CNT in the Al powder. Dual-nanoparticle-reinforced functionally graded multiple-layered composites were found to exhibit different mechanical characteristics. In particular, the hardnesses of the CNT-and nSiC-reinforced composites were dramatically increased, being up to eight times greater (330 HV) than that of bulk pure Al. In the case of the combination of the CNT and nD nanoparticles, the reinforced Al matrix composites exhibited the highest flexural strength (about 760 MPa). This functionally graded dual-nanoparticle approach could also be applied to other nanoreinforced systems, such as ceramics or complex hybrid-matrix materials. Keywords: Carbon nanotubes (CNT), nanosilicon carbide (nSiC), nanodiamond (nD), functionally graded materials (FGM), Powder metallurgy

Carbon nanotubes: Amino functionalization and its application in the fabrication of Al-matrix composites

2012 ◽  
Vol 215-216 ◽  
pp. 254-263 ◽  
Author(s):  
S.K. Singhal ◽  
Renu Pasricha ◽  
Mamta Jangra ◽  
Rajiv Chahal ◽  
Satish Teotia ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Matrix Composites ◽  
Amino Functionalization ◽  
Al Matrix Composites ◽  
Al Matrix

Microstructural characterization and wear properties of ultra-dispersed nanodiamond (UDD) reinforced Al matrix composites fabricated by ball-milling and sintering

2011 ◽  
Vol 46 (13) ◽  
pp. 1521-1534 ◽  
Author(s):  
H Kaftelen ◽  
ML Öveçoğlu
Keyword(s):  
Wear Resistance ◽  
Ball Milling ◽  
Microstructural Characterization ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Al Matrix Composites ◽  
Al Matrix Composite ◽  
Al Matrix

Elemental aluminum (Al) powders reinforced with 1–10 wt% of ultra-dispersed nanodiamond (UDD) powders were ball-milled in a SpexTM Mixer/Mill between 0 and 120 min followed by consolidation and sintering. X-ray diffraction analyses on the ball-milled powders revealed only α-Al peaks, whereas Al4C3 phase was identified along with α-Al in all sintered composites. Increasing the addition of nanodiamond to Al-matrix resulted in improved hardness of both ball-milled and sintered composites. The wear resistances of the Al-UDD composites were significantly improved with increasing UDD contents. Under similar load and sliding conditions, the wear resistance of Al matrix composite containing 10 wt% nanodiamond enhances about 40 times when compared with unreinforced aluminum.

Mechanism of ceramic-like friction of quasicrystal reinforced Al matrix composites formed by in-situ directed energy deposition

2021 ◽  
pp. 1-27
Author(s):  
Shuo Li ◽  
Mohamed El Mansori ◽  
Qingzheng Wang ◽  
Nan Kang ◽  
Mourad Elhadrouz
Keyword(s):  
Wear Resistance ◽  
Matrix Composite ◽  
Energy Deposition ◽  
Wear Behavior ◽  
Matrix Composites ◽  
Directed Energy Deposition ◽  
Al Matrix Composites ◽  
Directed Energy ◽  
Al Matrix Composite ◽  
Al Matrix

Abstract The wear of aluminum alloy may be decreased by its reinforcement with quasicrystals prepared by melt, which in itself has good wear-resisting properties. This research paper considers the part played by a dense Al-Fe-Cr quasicrystal (QC) reinforced Al matrix composite fabricated by the directed energy deposition (DED) in reducing wear between sliding surfaces and discusses briefly some of the factors which, in practice, explain ceramic-like properties of quasicrystal including low friction and wear resistance. The hardness of reinforcement phases, QC Al91Fe4Cr5 and Al13(Fe, Cr)4, was up to ~ 91 and ~ 112 HV respectively, while the Al matrix was just ~ 70 HV. Furthermore, the reinforcement phases contributed to form the mechanical mixing layer (MML) which significantly decreased the coefficient of friction (COF) and improves the wear resistance. With the increase of load from 1N to 5N, the COF dropped from 0.82 to 0.33 because the higher load was beneficial to the formation of harder and denser MML. Through the comprehensive analysis of the wear test and worn surface, the wear behavior and mechanism of this QC reinforced Al matrix composite has been explained in detail. The results indicate that the quasicrystal reinforced Al matrix composites formed by DED is one of the promising wear-resistance materials.

3D printing of Al matrix composites through in situ impregnation of carbon nanotubes on Al powder

Carbon ◽  
2020 ◽  
Vol 162 ◽  
pp. 465-474 ◽  
Author(s):  
Kang Geng ◽  
Shaofu Li ◽  
Y.F. Yang ◽  
R.D.K. Misra
Keyword(s):  
Carbon Nanotubes ◽  
3D Printing ◽  
Matrix Composites ◽  
Al Powder ◽  
Al Matrix Composites ◽  
Al Matrix

Thermal Conductivity of Cubic Boron Nitride (cBN) Particle Dispersed Al Matrix Composites Fabricated by SPS

2016 ◽  
Vol 879 ◽  
pp. 2413-2418 ◽  
Author(s):  
Kiyoshi Mizuuchi ◽  
Kanryu Inoue ◽  
Yasuyuki Agari ◽  
Motohiro Tanaka ◽  
Takashi Takeuchi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Volume Fraction ◽  
Cubic Boron Nitride ◽  
Matrix Composites ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Al Matrix Composites ◽  
Al Matrix Composite ◽  
Al Matrix

Cubic boron nitride (cBN) particle-dispersed-aluminum (Al) matrix composites were fabricated from the powder mixture composed of cBN, pure Al and Al-5mass% Si alloy in liquid and solid co-existent state by spark plasma sintering (SPS) process. Al/cBN composites were well consolidated by heating at a temperature range between 798 K and 876 K for 1.56 ks by SPS. Microstructures of the composites produced were examined by scanning electron microscopy and the reaction between the cBN particle and the Al matrix was not detected. The relative packing density of the Al/cBN composite was higher than 99 % in a volume fraction range of cBN up to 45 %. The thermal conductivity of the composite increased with increasing the cBN content in the composite in a volume fraction range of cBN between 35 and 45 vol. %. The highest thermal conductivity of 305 W/mK was obtained for Al matrix composite containing 45 vol.% cBN particles.

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