scholarly journals The Effect of Silane Treatment on Rice Husk / Phenol Formaldehyde Particleboard Mechanical Properties

2018 ◽  
Vol 7 (3.18) ◽  
pp. 53
Author(s):  
Marini Sawawi ◽  
Nor Umirah Sudirman ◽  
Siti Kudnie Sahari ◽  
Mahshuri Yusof ◽  
Magdalene Andrew ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Phenol Formaldehyde ◽  
Solution Treatment ◽  
Bending Test ◽  
Silane Treatment ◽  
Characteristic Functional ◽  
The Matrix ◽  
Swelling Characteristics ◽  
Treatment Concentration

The effects of silane (3-aminopropyl triethoxy silane aqueous solution) treatment on the mechanical properties on rice husk particle board were investigated. Using phenol formaldehyde as the binder, the rice husks were treated at three different concentrations of silane (0.5 wt%, 2 wt%, 5 wt%) and untreated rice husk was set as control. The samples were characterized using Scanning Electron Microscope (SEM), 3-point bending test and water absorption behavior in accordance to ASTM1037. FTIR analysis was performed to verify the presence of the characteristic functional groups of untreated rice husk and silane treated husk. The results show that the mechanical properties were increased with silane treatment concentration. The swelling characteristics also improved as the concentration of silane increases less water were absorbed. Surface morphology of rice husk shows that the surface of the composites become rougher as the concentration of treatment was increased for better adhesion between fibers and the matrix. 

The Investigation on Aluminium Alloys Automobile Wheel with Low-Titanium Content Produced by Electrolysis

2005 ◽  
Vol 475-479 ◽  
pp. 317-320 ◽  
Author(s):  
Jing Pei Xie ◽  
Ji Wen Li ◽  
Zhong Xia Liu ◽  
Ai Qin Wang ◽  
Yong Gang Weng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminium Alloys ◽  
Solution Treatment ◽  
A356 Alloy ◽  
Aging Treatment ◽  
Titanium Content ◽  
The Matrix ◽  
Automobile Wheel

The in-situ Ti alloying of aluminium alloys was fulfilled by electrolysis, and the material was made into A356 alloy and used in automobile wheels. The results show that the grains of the A356 alloy was refined and the second dendrites arm was shortened due to the in-situ Ti alloying. Trough 3-hour solution treatment and 2-hour aging treatment for the A356 alloy, the microstructures were homogeneous, and Si particles were spheroid and distribute in the matrix fully. The outstanding mechanical properties with tensile strength (σb≥300Mpa) and elongation values (δ≥10%) have been obtained because the heat treatment was optimized. Compared with the traditional materials, tensile strength and elongation were increased by 7.6~14.1% and 7.4~44.3% respectively. The qualities of the automobile wheels were improved remarkably.

Influences of the γ′ Phase on the Mechanical Properties of a Nickel-Based Single Crystal Superalloy

2021 ◽  
Vol 1023 ◽  
pp. 45-52
Author(s):  
Xiao Yan Wang ◽  
Meng Li ◽  
Zhi Xun Wen
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Single Crystal ◽  
Tensile Properties ◽  
Room Temperature ◽  
Solution Treatment ◽  
Single Crystal Superalloy ◽  
Original Material ◽  
Solid Solution Treatment ◽  
The Matrix

After solid solution treatment at 1335°C for 4 hours and cooling to room temperature at different rate, the nickel-based single crystal superalloy were made into three kinds of nickel-based single crystal superalloy materials containing different size γ′ phases, respectively. The tensile test of I-shaped specimens was carried out at 980°C, and their effect of γ′ phase microstructure on the tensile properties was studied. The results show that the yielding strength of the material air-cooled to room temperature was lower than that with cooling rate at 0.15°C/s, but both of them were lower than the yielding strength of original material. Little difference was found on the elastic modulus of I-shaped specimens made of three kinds of materials. When the cubic degree of the γ′ phase is higher and the size is larger, the tensile properties of the material is better, which can be attributed to the larger size and narrower channel of the matrix phase that lead to higher dislocation resistance.

Effects of Bagasse Fiber on Crystallization, Morphological and Mechanical Properties of Poly(Lactic acid)

2012 ◽  
Vol 602-604 ◽  
pp. 708-711
Author(s):  
Jun Cai ◽  
Nan Shi ◽  
Qiang Dou
Keyword(s):  
Mechanical Properties ◽  
Flexural Modulus ◽  
Mechanical Tests ◽  
Silane Treatment ◽  
Melt Blending ◽  
Scanning Calorimetry ◽  
Crystallization Ability ◽  
The Matrix ◽  
Bagasse Fiber ◽  
Melting And Crystallization

Polylactic acid (PLA)/bagasse fiber (BF) composites were prepared via melt blending. The melting and crystallization behavior, morphology and mechanical properties of the composites were studied by means of differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and mechanical tests. The results indicate that the crystallization ability of PLA is improved with the addition of BF. Silane treatment improves the adhesion between BF and the matrix. Compared with pure PLA, the flexural modulus increases, while the notched impact strength decreases for BF/PLA composites.

scholarly journals Effects of the Mg/Si Ratio on Microstructure, Mechanical Properties, and Precipitation Behavior of Al–Mg–Si–1.0 wt %-Zn Alloys

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2591 ◽  
Author(s):  
Yong Li ◽  
Guanjun Gao ◽  
Zhaodong Wang ◽  
Hongshuang Di ◽  
Jiadong Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Solution Treatment ◽  
Hardness Test ◽  
Strengthening Effect ◽  
Precipitation Behavior ◽  
Scanning Calorimetry ◽  
First Choice ◽  
The Matrix ◽  
Zn Alloys

Aluminum alloys are widely used as first-choice materials for lightweight automotive applications. It is important that an alloy have a balance between strength and formability. In this study, the alloys were melted, cast, hot rolled, and cold rolled into 1 mm-thick sheets. The microstructure, mechanical properties, and precipitation behavior of Al–Mg–Si–1.0 wt %-Zn alloys with Mg/Si ratios of 0.5, 1, and 2 after solution treatment were studied using optical and electron microscopy, a tensile test, the Vickers hardness test, and differential scanning calorimetry. The results showed that a high density and number of Al–Fe–Si particles were observed in the matrix, thus causing the formation of more homogeneous and smaller recrystallized grains after treatment with the solution. In addition, a higher volume fraction of cubeND and P-types texture components formed during solution treatment. Also, a high r value and excellent deep drawability were achieved in the medium-Mg/Si-ratio alloy. The formation of denser strengthening precipitates led to a better paint-bake hardening effect in comparison with the other two alloys. Furthermore, the precipitation kinetics were enhanced by the addition of Si, and the addition of Zn did not alter the precipitation sequence of the Al–Mg–Si alloy. The dual-phase strengthening effect was not achieved in the studied alloys during paint-bake treatment at 175 °C.

The Effect of Silane Treatment on Processing Characteristic and Swelling Behavior of Polypropylene/Recycled Acrylonitrile Butadiene Rubber/Rice Husk Powder Composites

2011 ◽  
Vol 471-472 ◽  
pp. 478-483 ◽  
Author(s):  
Santiagoo Ragunathan ◽  
Hanafi Ismail ◽  
Hussin Kamarudin
Keyword(s):  
Rice Husk ◽  
Swelling Behavior ◽  
Butadiene Rubber ◽  
Silane Treatment ◽  
Melt Mixing ◽  
Processing Characteristic ◽  
Acrylonitrile Butadiene Rubber ◽  
Swelling Characteristics ◽  
Powder Composites ◽  
Internal Mixer

The effect of silane treatment on processing characteristic and swelling behavior of recycled acrylonitrile butadiene rubber (NBRr)/polypropylene (PP)/rice husk powder (RHP) composites has been studied. Polypropylene/recycled acrylonitrile butadiene rubber/rice husk powder (PP/NBRr/RHP) composite were prepared by melt mixing technique at 180º C for 9 minutes and 50rpm rotor speed using an internal mixer. Five different composites compositions (70/30/0, 7030/5, 70/30/10, 70/30/15 and 70/30/30), with silane treated RHP (treated) and without silane treatment RHP (untreated) was studied. The specimens were analyzed for swelling behavior with ASTM oil No.3 and processing torque of composites was obtained during composite preparation. The results showed that swelling percentage for both composites increased with NBRr content. However the treated composites exhibited lower swelling characteristics. Processing torque of both composites also showed higher torque reading with increasing NBRr content. However the treated composite with silane exhibited much higher torque value for similar composition composites. Better interaction between RHP filler and PP/NBRr matrixs was obtained with treated composites.

Thermal Conductivity of EPDM Rubber Filled with Modified Nano-AlN

2013 ◽  
Vol 561 ◽  
pp. 146-151
Author(s):  
Lian Xiang Ma ◽  
Na Zhang ◽  
Gang Yang ◽  
Yan He
Keyword(s):  
Mechanical Properties ◽  
Free Energy ◽  
Surface Free Energy ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Epdm Rubber ◽  
The Matrix ◽  
Conductive Fillers ◽  
Thermal Conductivities

In order to improve the thermal conductivities of composites, AlN are used as thermal conductive fillers of EPDM rubber. The contact angle and surface free energy of AlN and modified AlN are studied. The influence filler amount and the surface treatment of AlN which coated by phenol formaldehyde resin (PF), on the thermal conductivities and mechanical properties of composites material are also investigated. The results show that the surface free energy of modified AlN is lower than unmodified, so the modified AlN are easier dispersion in the matrix. Through the TGA analysis, it can give a quantitative analysis of the surface coating thickness. With the increase of the filler, the thermal conductivities of composites are all on the rise, while the mechanical properties decreased in different degree. The modified AlN have active impacts on the thermal conductivities and harmful to mechanical properties of the filled EPDM rubber.

Microstructure Evolution and Mechanical Properties of Mg-3Zn-0.5Er-0.5Al Alloy

2015 ◽  
Vol 816 ◽  
pp. 446-450
Author(s):  
Xiao Bing Zheng ◽  
Wen Bo Du ◽  
Ke Liu ◽  
Zhao Hui Wang ◽  
Shu Bo Li
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Tensile Strength ◽  
Microstructure Evolution ◽  
Mass Fraction ◽  
Solution Treatment ◽  
Solid Solution Treatment ◽  
Solution Treated ◽  
Quaternary Phase ◽  
The Matrix

The microstructure evolution of the Mg-3Zn-0.5Er-0.5Al (mass fraction, %) alloy under the different condition was investigated. The results showed that as-cast Mg-3Zn-0.5Er-0.5Al alloy mainly consisted of primary large irregular Mg4Zn7 phase and needlelike (Mg, Zn, Er, Al) quaternary phase. Mg4Zn7 phase almost dissolved into the matrix after solid solution treatment at 400 oC for 10 h, while the (Mg, Zn, Er, Al) quaternary phase still existed. The solution treated alloy was extruded at 250 °C. The ultimate tensile strength of the as-extruded alloy was approximately 268 MPa and the YTS was approximately 163 MPa companying with an elongation of 28%. The tensile strength of the as-extruded alloy improved obviously, which was mainly attributed to the grain refinement.

scholarly journals Rheological and mechanical properties of wood flour filled polyisoprene/chlorosulphonated polyethylene rubber blends

2007 ◽  
Vol 13 (4) ◽  
pp. 186-191 ◽  
Author(s):  
Gordana Markovic ◽  
Milena Marinovic-Cincovic ◽  
Blaga Radovanovic ◽  
Jaroslava Budinski-Simendic
Keyword(s):  
Mechanical Properties ◽  
Phenol Formaldehyde ◽  
Wood Flour ◽  
Filler Loading ◽  
Swelling Properties ◽  
Rubber Blends ◽  
Equilibrium Swelling ◽  
Swelling Characteristics ◽  
Chlorosulphonated Polyethylene ◽  
Elastomeric Composites

The effect of wood flour (WF) on curing behavior and swelling properties of polyisoprene rubber/chlorosulphonated polyethylene (NR/CSM) rubber blends was investigated. The mechanical properties, as well as the equilibrium swelling characteristics of the elastomeric composites filled with WF (particle size from 300 to 400 ?m) were measured as a function of filler loading (the range of 0 to 50 phr) and compared with the values for the elastomeres based on commercial grade carbon black filler (nano-sized particles, 26-30 nm). In some formulations phenol-formaldehyde (PF) resins are used to achieve better adhesion between rubber macromolecules and filler particles. For WF filled elastomeres the maximum tensile strength of 11 MPa at 20 phr was recorded. Hardness of samples filled with WF increased with filler loading. Abrasion resistance decreases marginally with increasing filler loading. The equilibrium sorption in toluene of NR/CSM vulcanizates filled decreased with increasing filler loading for both type of filler.

Effects of Er on Microstructure and Mechanical Properties of Mg-Zn-Er-Zr Magnesium Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 105-108 ◽  
Author(s):  
Qu Dong Wang ◽  
Da Quan Li ◽  
Qiang Li ◽  
Wen Jiang Ding
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Solution Treatment ◽  
Precipitation Process ◽  
Strengthening Effect ◽  
Microstructure And Mechanical Properties ◽  
The Matrix ◽  
Zr Alloy ◽  
Zr Alloys

Microstructure and mechanical properties of Mg-Zn-Er-Zr alloys were characterized in detail. The grain size of as-cast Mg-Zn-Er-Zr alloy was greatly decreased by the Mg-Zn-Er phases formed at grain boundaries. The addition of Er can increase the yield strength (YS) but decrease the ultimate tensile strength (UTS) and elongation of as-cast Mg-Zn-Zr alloy. The thermally stable Mg-Zn-Er phases were just partially dissolved into the matrix during solution treatment. And the addition of Er can prolong the precipitation process of Mg-Zn-Zr alloy. Solution-plus-ageing treatment can increase the strength of both the Mg-Zn-Zr and Mg-Zn-Er-Zr alloys, but the strengthening effect of Mg-Zn-Er-Zr alloy was greatly weakened, for the incompletely solution of Mg-Zn-Er phases. Er can greatly enhance the high temperature elongation of Mg-Zn-Zr alloy, but the increase of high temperature tensile strength was just a little.

Study on Mechanical Properties and Microstructures of Mg-6Zn-2Gd-0.6Zr New Sand-Casting Magnesium Alloy

2010 ◽  
Vol 654-656 ◽  
pp. 651-654 ◽  
Author(s):  
Guang Yu Yang ◽  
Jie Hua Li ◽  
Wan Qi Jie ◽  
Zhong Yu
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Room Temperature ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Sand Casting ◽  
Secondary Phases ◽  
Elevated Temperature Strength ◽  
Solid Solution Treatment ◽  
The Matrix

A new composition sand-casting magnesium alloy, Mg-6Zn-2Gd-0.6Zr, was developed. It was found that the room temperature mechanical properties of the alloy were superior: b=270MPa, 0.2=175MPa, =8%. Meanwhile, the elevated-temperature strength and creep resistance were significantly improved, comparing with Mg-5Zn-0.6Zr (ZK51) commercial magnesium alloy. The as-cast microstructure of the alloy was mainly consisted of (Mg) matrix, (+Mg3Gd2Zn3+Mg3Gd) eutectic phase, which was distributed along the (Mg) grain boundary with coarse netted shape. After solid-solution treatment and subsequently aging treatment for the alloy, the secondary phases re-precipitated as fine discontinues semi-netted or short rod-like precipitations, also including some fine spherical precipitations in the  matrix, which were responsible for the properties improvement of the alloy.

Sign in / Sign up

Export Citation Format

Share Document