Author
Zuoyong Dou
Bio: Zuoyong Dou is an academic researcher from Harbin Institute of Technology. The author has contributed to research in topics: Cenosphere & Ultimate tensile strength. The author has an hindex of 8, co-authored 9 publications receiving 560 citations.
Papers
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TL;DR: In this article, a new method was established to predict the compressive strength of cenosphere-aluminum syntactic foams, showing the relation between the relative wall thickness of the cenopshere and the Compressive Strength of such foams.
140 citations
TL;DR: In this article, a three-parameter data-fitting equation has been developed to predict the rate-dependent compressive stress at relatively low strains for the syntactic foams.
94 citations
TL;DR: In this paper, the cenosphere and precipitator fly ash particulates were used to produce two kinds of aluminum matrix composites with the density of 1.4-1.6 and 2.2-2.4g cm −3 separately.
Abstract: The cenosphere and precipitator fly ash particulates were used to produce two kinds of aluminum matrix composites with the density of 1.4–1.6 g cm −3 and 2.2–2.4 g cm −3 separately. The electromagnetic interference shielding effectiveness (EMSE) properties of the composites were measured in the frequency range of 30.0 kHz–1.5 GHz. The results indicated the EMSE properties of the two types of composites were nearly the same. By using the fly ash particles, the shielding effectiveness properties of the matrix aluminum have been improved in the frequency ranges 30.0 kHz–600.0 MHz and the increment varied with increasing frequency. The EMSE properties of 2024Al are in the range −36.1 ± 0.2 to −46.3 ± 0.3 dB while the composites are in the range −40.0 ± 0.8 to −102.5 ± 0.1 dB in the frequency range 1.0–600.0 MHz. At higher frequency, the EMSE properties of the composites are similar to that of the matrix. The tensile strength of the matrix aluminum has been decreased by addition of the fly ash particulate and the tensile strength of the composites were 110.2 MPa and 180.6 MPa separately. The fractography showed that one composite fractured brittly and the other fractured in a microductile manner.
91 citations
TL;DR: In this article, the damping properties of hollow sphere fly ash/6061Al composites with various reinforcement diameters and with about 40 vol.% porosities have been measured by using the forced vibration mode and the bending-vibration mode on the multifunctional internal friction apparatus.
77 citations
TL;DR: SiC/Gr/Al composites were fabricated by squeeze casting with graphite volume fractions of 3-7% and particles size of 1, 6, 10, 20 and 70μm as mentioned in this paper.
76 citations
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TL;DR: In this paper, a review of the approaches related to porous high EMI shielding composite materials that have very low density values is presented, focusing on porous materials for electromagnetic interference (EMI) shielding.
Abstract: Lightweight porous materials for electromagnetic interference (EMI) shielding applications are reviewed. EMI shielding refers to the capability of a material to protect from electromagnetic fields (EMFs) generated by electronic devices. Traditionally conducting metals are used in EMI shielding applications, which are slowly being replaced by conducting polymer based shields. This review is narrowly focused on understanding the approaches related to porous high EMI shielding composite materials that have very low density values. While metallic fillers can increase the EMI shielding capabilities of polymers, they also increase the weight, which can be offset by inducing the porosity in the matrix. Porosity is found to be effective in providing higher shielding effectiveness at low filler volume fraction due to concentrating the filler in the solid polymers. However, use of gas porosity results in composites with low mechanical properties. This problem can be alleviated to some extent by reinforcing polymer foams with lightweight conductivefillers such as carbon nanofibers (CNFs), carbon nanotubes (CNTs) and graphene. But the properties of pores such aspore size and distribution cannot be effectively controlled in such cases. Syntactic foams containing hollow particle fillers seem to be the best combination of EMI shielding capabilities and mechanical properties. These composites can be either filled with a second phase conducting filler, or hollow particles can be coated with a conducting layer, or hollow particles made of conducting materials can be used as fillers. The hollow particle wall thickness and volume fractions can be optimized to obtain the desired combination of properties in syntactic foams to enable their multifunctional applications.
310 citations
TL;DR: In this paper, an Al-7Si alloy reinforced with in situ TiB 2 particles was synthesized successfully by using salt reaction route and the in situ composites have shown significant improvement in mechanical properties in comparison to the base alloy.
282 citations
TL;DR: In this paper, the effect of three different stir casting routes on the structure and properties of fine fly ash particles (13μm average particle size) reinforced Al-7Si-0.35Mg alloy composite is evaluated.
273 citations
TL;DR: In this paper, a review on the aspects of phenomena, mechanisms and modelling of dynamic compressive behavior of cellular materials is presented, focusing on the macroscopic dynamics of the cellular materials with the subscale influential factors.
246 citations
TL;DR: In this article, fly ash Cenospheres are used as reinforcing filler in High density polyethylene (HDPE) to develop lightweight composites and the tensile and thermal properties of the composites were measured according to ASTM methods.
225 citations