scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Overview of Electric Discharge Machining of MachineTooled Ceramics and Ceramic-Based Composites

01 Jun 2023-2 (2)-Vol. 9, Iss: 2, pp 9-16
TL;DR: In this paper , the applicability of basalt as a reinforcing agent in polymer composites has been investigated and the results show that basalt is better than glass reinforced composites.
Abstract: Accordingly, many engineering designers have improved the wear friction performance of such materials. Also, the use of polymers as reinforcements in their endeavors has been done to improve intrinsic performance. Intrinsic properties played an important role in intrinsic polymer orientations, improving the cohesion of some reinforcement while at the same time worsening those Effects Woven glass, carbon and amethyst polymeric composites Inter-laminar shear strength and abrasion composites samples. Wear properties are calculated using machine and testing machine in computer aided universal testing. Fracture of composites showed surface modifications for Group bonding. The mechanical properties of basalt are better than glass reinforced composites the result of the study confirms the applicability of basalt as a reinforcing agent in polymer composites. Hybrid Mechanical Processes Ultrasonic assisted laser/water jet machining processes are used to solve machining problems related to insulating ceramics such as ultrasonic assisted discharge machining, discharge milling, electro-chemical discharge machining and powder hybrid discharge machining and discharge diamond grinding. Processes can create complex patterns in spark discharges. An attempt has been made here to compare the convex stability with the above cast iron and polymer impregnated mechanical properties.
References
More filters
Journal ArticleDOI
TL;DR: In this article, the authors described the cultivation of kenaf and application to biodegradable composite materials, and the unidirectional fiber-reinforced composites showed tensile and flexural strength of 223 MPa and 254 MPa, respectively.

633 citations

Journal ArticleDOI
TL;DR: In this paper, a process for fabrication of aluminium-alloy composites containing paniculate non-metals, the net shape forming of these composites, their microstructures, their friction and wear behaviours and their mechanical properties are described.
Abstract: In this paper processes for fabrication of aluminium-alloy composites containing paniculate non-metals, the net shape forming of these composites, their microstructures, their friction and wear behaviours and their mechanical properties are described. Composites of two wrought (2014 and 2024) and one cast (201) aluminium alloys containing 2 to 30 wt% of Al2O3 and SiC particles in the size range of 1 to 142μm were prepared. The non-metallic particles were added to a partially-solid vigorously-agitated matrix alloy. The particles were then retained in the matrix until interface interaction, for example, the formation of MgAl2O4 spinel in the case of Al2O3 particles, were faciliated. These composites were solidified and subsequently reheated to above their liquidus temperature and formed under high pressure in a closed-die forging type of apparatus. Composites with particulate additions of size larger than 5μm possessed homogeneous structures; particles of size 1μm, however, tended to cluster. The wear behaviour of the composites was studied using a pin-on-disc type machine. It was shown that composites containing large amounts of non-metals, ≈ 20 wt%, exhibit excellent wear resistance whilst those with small to moderate amounts of non-metals possess tensile properties comparable to the matrix alloy. Increasing the amount of particulate additions results in reduced ductility. Finally, a method was investigated of producing components with high weight-fractions of non-metals near their surface.

407 citations

Journal ArticleDOI
TL;DR: In this work, palm and coir fiber reinforced polypropylene bio-composites were manufactured using a single extruder and injection molding machine and 30% fiber reinforced composites had the optimum set of mechanical properties.

334 citations

Journal ArticleDOI
TL;DR: In this paper, the tensile properties of polystyrene reinforced with short sisal fiber and benzoylated sisal fibers were studied by using IR spectroscopy, and the properties were found to be almost independent of fiber length although the ultimate tensile strength shows marginal improvement at 10 mm fiber length.
Abstract: The tensile properties of polystyrene reinforced with short sisal fiber and benzoylated sisal fiber were studied. The influence of fiber length, fiber content, fiber orientation, and ben-zoylation of the fiber on the tensile properties of the composite were evaluated. The ben-zoylation of the fiber improves the adhesion of the fiber to the polystyrene matrix. the benzoylated fiber was analyzed by IR spectroscopy. Experimental results indicate a better compatibility between benzoylated fiber and polystyrene. the benzoylation of the sisal fiber was found to enhance the tensile properties of the resulting composite. The tensile properties of unidirectionally aligned composites show a gradual increase with fiber content and a leveling off beyond 20% fiber loading. The properties were found to be almost independent of fiber length although the ultimate tensile strength shows marginal improvement at 10 mm fiber length. The thermal properties of the composites were analyzed by differential scanning calorimetry. Scanning electron microscopy was used to investigate the fiber surface, fiber pullout, and fiber–matrix interface. Theoretical models have been used to fit the experimental mechanical data. © 1996 John Wiley & Sons, Inc.

319 citations

Journal ArticleDOI
TL;DR: In this article, the effect of fiber treatments and MAPP content on the tensile strength and Young's modulus of composites was investigated, and the optimum composite, consisting of polypropylene, 40-wt% NaOH/Na 2 SO 3 treated hemp fibre and 4-wwt% MAPP, was found to have a strength of 50.5MPa and a Young's Modulus of 5.31GPa.
Abstract: Hemp fibres were alkali treated to improve their suitability for use as reinforcements in composite materials. Improvements in tensile strength, Young’s modulus, fibre separation, crystallinity index, lignin reduction and thermal stability were observed for hemp fibres treated with a solution of 5 wt% NaOH/2 wt% Na 2 SO 3 . A range of hemp fibre reinforced polypropylene composites were produced by extrusion and injection moulding, and the effect of fibre treatments and MAPP content on the tensile strength and Young’s modulus of composites were investigated. The optimum composite, consisting of polypropylene, 40 wt% NaOH/Na 2 SO 3 treated hemp fibre and 4 wt% MAPP, was found to have a tensile strength of 50.5 MPa and a Young’s modulus of 5.31 GPa.

309 citations