The Effect of Fillers on Chrome-Based Wave-Transparent Material Matrix

2012 ◽  
Vol 557-559 ◽  
pp. 357-361 ◽  
Author(s):  
Zheng Hai Liu ◽  
Ji Chuan Huo ◽  
Hai Bin Wang ◽  
Hong Lei ◽  
Yong Lin Lei
Keyword(s):  
Mechanical Properties ◽  
Dielectric Properties ◽  
Absorption Rate ◽  
Moisture Absorption ◽  
Aluminum Phosphate ◽  
Curing Temperature ◽  
Curing Agent ◽  
Matrix Composites ◽  
Transparent Material ◽  
Properties Of Materials

Phosphate of chrome-alumina (PCA) matrix composites were successfully prepared via thermoforming by using chrome-aluminum phosphate as adhesive, ZnO as curing agent and single component or combination of Al2O3, SiO2, SiC and Si3N4as fillers. We have studied the effect of different fillers on the mechanical properties, dielectric properties and moisture absorption rate of composite materials. Results show that, for the PCA-III system, when curing temperature is 180°C, the dielectric properties of materials are the best and the moisture absorption rate is the minimum; When the amount of filler is 35%, the mechanical properties of PCA-III system are the best (i.e. the tensile strength is 94.4MPa and the flexural strength is 134.7MPa).

Effect of Reinforcement Addition on Microstructure and Mechanical Properties of Al Matrix Composites

2014 ◽  
Vol 989-994 ◽  
pp. 515-518
Author(s):  
Guo Jun Ma ◽  
Yu Tian Ding ◽  
Pei Peng Jin
Keyword(s):  
Mechanical Properties ◽  
Ductile Failure ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Composite Image ◽  
Properties Of Materials ◽  
Al Matrix Composites ◽  
Al Matrix ◽  
Fracture Nucleation

The study investigates the influence of different fraction of Mg2B2O5 whiskers (5, 10, 15 and 20vol.% ) on the microstructure of the hot extruded composite as well as on the mechanical properties in the same condition. The results indicate that the process is available for producing the composite, image analysis shows the whisker tends to cluster together with increasing content of reinforcement. When the content of the reinforcement is 10%, the composites exhibit the best mechanical properties, meanwhile, it demonstrate cluster is unfavorable to the improvement of properties of materials. The ductile failure of 6061Al matrix, the reinforcement fracture and the whisker-matrix interface debonding acted as the main mechanism of fracture nucleation.

Study on Effect of Particle Size of Matrix and Reinforcement on Properties of Iron Matrix Composites

2012 ◽  
Vol 182-183 ◽  
pp. 328-331
Author(s):  
Yu Fang Yang ◽  
Kang Ju Li
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Matrix Composites ◽  
Hot Press ◽  
Iron Matrix ◽  
Direct Heating ◽  
Effect Of Particle Size ◽  
Properties Of Materials ◽  
Hot Press Sintering ◽  
Properties Of Composites

The effect of particle size of iron and size of reinforce particle on properties of materials was studied systematically by the specimen current direct heating dynamic hot press sintering. It is found that mechanical properties of composites increase with the increasing particle size of iron. The properties of SiCp/Fe composites firstly increase and decrease with particle size of SiC and properties are better when size is 15μm.

scholarly journals A Review of Prestressed Fibre-Reinforced Polymer Matrix Composites

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 60
Author(s):  
Raphael Olabanji Ogunleye ◽  
Sona Rusnakova
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Residual Stresses ◽  
Matrix Composite ◽  
Polymer Matrix ◽  
Moisture Absorption ◽  
Polymer Matrix Composites ◽  
Great Influence ◽  
Polymer Matrix Composite ◽  
Matrix Composites

This review examines various studies on reducing tensile stresses generated in a polymer matrix composite without increasing the mass or dimension of the material. The sources of residual stresses and their impacts on the developed composite were identified, and the different techniques used in limiting residual stresses were also discussed. Furthermore, the review elaborates on fibre-prestressing techniques based on elastically (EPPMC) and viscoelastically (VPPMC) prestressed polymer matrix composites, while advantages and limitations associated with EPPMC and VPPMC methods are also explained. The report shows that tensile residual stresses are induced in a polymer matrix composite during production as a result of unequal expansion, moisture absorption and chemical shrinkage; their manifestations have detrimental effects on the mechanical properties of the polymer composite. Both EPPMC and VPPMC have great influence in reducing residual stresses in the polymer matrix and thereby improving the mechanical properties of composite materials. The reports from this study provide some basis for selecting a suitable technique for prestressing as well as measuring residual stresses in composite materials.

scholarly journals Effect of Moisture Absorption Behavior on Mechanical Properties of Basalt Fibre Reinforced Polymer Matrix Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Amuthakkannan Pandian ◽  
Manikandan Vairavan ◽  
Winowlin Jappes Jebbas Thangaiah ◽  
Marimuthu Uthayakumar
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Moisture Absorption ◽  
Polymer Matrix Composites ◽  
Unsaturated Polyester ◽  
Water Immersion ◽  
Polymeric Materials ◽  
Matrix Composites ◽  
Basalt Fibre ◽  
Saturation State

The study of mechanical properties of fibre reinforced polymeric materials under different environmental conditions is much important. This is because materials with superior ageing resistance can be satisfactorily durable. Moisture effects in fibre reinforced plastic composites have been widely studied. Basalt fibre reinforced unsaturated polyester resin composites were subjected to water immersion tests using both sea and normal water in order to study the effects of water absorption behavior on mechanical properties. Composites specimens containing woven basalt, short basalt, and alkaline and acid treated basalt fibres were prepared. Water absorption tests were conducted by immersing specimens in water at room temperature for different time periods till they reached their saturation state. The tensile, flexural, and impact properties of water immersed specimens were conducted and compared with dry specimens as per the ASTM standard. It is concluded that the water uptake of basalt fibre is considerable loss in the mechanical properties of the composites.

The effect of bismaleimide on thermal, mechanical, and dielectric properties of allyl-functional bisphthalonitrile/bismaleimide system

2016 ◽  
Vol 29 (9) ◽  
pp. 1016-1026 ◽  
Author(s):  
Mingli Jiang ◽  
Xingqiang Zou ◽  
Yumin Huang ◽  
Xiaobo Liu
Keyword(s):  
Mechanical Properties ◽  
Dielectric Properties ◽  
Composite Laminates ◽  
Fiber Composite ◽  
Wide Frequency Range ◽  
Curing Temperature ◽  
Scanning Calorimetry ◽  
Thermal Stabilities ◽  
Glass Fiber Composite ◽  
Polymerization Behavior

Allyl-functional phthalonitrile (DBPA-Ph) and bismaleimide (BMI) have been considered as advanced composite-matrix resins applied in various fields. In this work, self-promoted polymerization behavior and processability of DBPA-Ph/BMI system were investigated in detail. To further reveal the effect of BMI on the properties of DBPA-Ph/BMI system, the blends and the prepolymers of DBPA-Ph/BMI were prepared in different proportions. Their curing and rheological behaviors were investigated by differential scanning calorimetry and dynamic rheological analysis. The results further confirmed the possible reaction mechanisms and demonstrated that DBPA-Ph/BMI prepolymers exhibited good processability, which included wide processing window (approximately 75°C), low melting viscosity (<0.2 Pa·s), and better reactivity. The copolymers exhibited satisfactory thermal stabilities ( T5% > 421°C, char yield at 600°C >70%). Moreover, the DBPA-Ph/BMI/glass fiber composite laminates were prepared and the effect of the curing temperature and BMI content on mechanical properties and dielectric properties were also investigated. The results show that the composite laminates exhibit favorable mechanical properties and weak frequency dependence of dielectric properties over a wide frequency range. Above all, the research on DBPA-Ph/BMI system could expand its applications in industry, especially in the areas, which require high temperature resistance and excellent mechanical and dielectric properties.

Influence of Curing Process on the Performance of Epoxy Thermosets

2009 ◽  
Vol 79-82 ◽  
pp. 2175-2178
Author(s):  
Bao Hua Zhang ◽  
Jun Dan Ye ◽  
Bin Chen ◽  
Yan Qing Weng
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Tertiary Amine ◽  
Curing Temperature ◽  
Curing Agent ◽  
Hyperbranched Polyester ◽  
Epoxy Curing ◽  
Main Component ◽  
End Group

The performance of epoxy thermosets was greatly influenced by the curing agent and curing temperature. It was known that epoxy thermosets cured under high temperature would have high normal forces which could cause fracture of the structure and then decrease the mechanical properties of the material. It was accepted that epoxy curing system should be cured under low temperature with the thermosets had the same properties as those cured under high temperature. It was important to choose proper curing agent to reach the above goal. Latent epoxy curing agent whose main component was the hyperbranched polyester (HBP) with tertiary amine as the end group was prepared and was used to diglycidyl ether of bisphenol A (DGEBA) in this work. The properties such as tensile intensity, bending intensity, impact resistance and dynamic mechanic properties of the resulting epoxy thermosets were evaluated. It was found that the resulting epoxy thermosets cured under low temperature had better mechanical properties than those cured under high temperature. The latent epoxy curing agent whose main component was the hyperbranched polyester with tertiary amine as the end group was adaptive to be used in the epoxy base of composite.

scholarly journals Moisture Absorption Behavior and Adhesion Properties of GNP/Epoxy Nanocomposite Adhesives

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1850
Author(s):  
Nurziana Kong ◽  
Nur Zalikha Khalil ◽  
Holger Fricke
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Water Absorption ◽  
Water Uptake ◽  
Absorption Rate ◽  
Adhesive Bonding ◽  
Moisture Absorption ◽  
Adhesion Properties ◽  
Water Absorption Rate ◽  
Immersion Period

In the current work, an attempt has been made to investigate the effect of Graphene Nanoplatelets (GNP) reinforcement to water absorption behavior and mechanical properties of adhesive bonding with epoxy. Epoxy adhesive with various GNP content (i.e., 0.0~2.0 wt%) was utilized to joint aluminum adherend subjected to various immersion periods (i.e., 0~60 days). Subsequently, the effect of GNP reinforcement on water uptake, water absorption rate and tensile shear strength was investigated. Depending on GNP content, two distinct behaviors in water uptake and moisture absorption rate have been observed; specimens with lower GNP content (0.5~1.0 wt%) have demonstrated increased/retention of water uptake and water absorption rate regardless of immersion period. Meanwhile, at higher GNP content (1.5~2.0 wt%), decreased water uptake and water absorption rate are generally observed. At similar GNP content, regardless of immersion periods, water immersed specimens generally demonstrate higher or retention of shear strength when compared to specimens at 0-day immersion period. These observations suggest that the relation between moisture absorption behavior and mechanical properties of GNP-reinforced adhesive with GNP content are rather complex which might be attributed to the interplay of several possible mechanisms.

Effect of SiC Defects on Performance of Particle Reinforced Aluminum Matrix Composites

2020 ◽  
Vol 993 ◽  
pp. 730-738
Author(s):  
Zhong Run Xiao ◽  
Jun Hui Nie ◽  
Jian Zhong Fan
Keyword(s):  
Mechanical Properties ◽  
Ultrasonic Testing ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Large Area ◽  
The Matrix ◽  
Sic Particulates ◽  
Properties Of Materials ◽  
The Difference

The effect of segregation defect of SiC particles on the properties of materials was studied. 15% SiCp/2009Al composites were prepared by powder metallurgy (PM). Special SiC/Al samples were added to 15% SiCp/2009Al composites. These SiC/Al samples with different sizes and volume fractions were 25%, 35%, 45% and 60%, respectively, which resulted in SiC particulates segregation defect. The 15% SiCp/2009Al composites with defects were tested by ultrasonic testing. Tensile samples were obtained at the locations, where defects might be detected and the mechanical properties were tested. The results showed that all defective samples were cracked at the defective location. The difference in tensile strength between the samples of defect and the samples without defect was large. The toughness of the sample containing the defect reduced and the brittleness increased. The dimples on the matrix indicate that ductile fracture occurred during the fracture process. The cleavage fracture or cracking of the SiC particulates indicated that the stress can be effectively transferred from the matrix to the particles, and the particulates strengthen the matrix well. However, the sample with defect led to brittle fracture in the defect, and a crack source produced at the interface, resulting in a significant decrease in the mechanical properties of the material. If the inhomogeneous distribution of particulate containing a large area was found in the ultrasonic testing of the aluminum matrix composites, the tensile properties of the products generally cannot meet the requirement for application.

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