- Mon - Sat 8:00 - 18:00
- [email protected]
- 0086-21-58386256
This study experimentally investigates the influence of adding SiC on microstructure and mechanical properties of the aluminium alloys welded joints. The SiC particles have been directly added into a zone of friction stir welding (FSW) to make (AA6061–AA2024) SiC composites material. Results show that the effect of adding SiC …
Zhang et al [24, 25] should be referred to. In their work, Zhang et al produced a smooth groove in a hot-pressed alumina sample in the single-point grinding process at a speed of 1800mmin −1. Figure 2 shows the images of the groove taken from the top and cross-sectional views by a scanning electron microscope (SEM).
In grinding process, sandpapers composed of SiC (silicon carbide) grain and magnetite dust were used in the order of 320, 500, 1200, 2400, and 4000 grids successively. To avoid any microstructural change, samples were cooled with water during the grinding process. In the polishing process, diamonds suspensions with different grain sizes and
then characterized for material properties. Material properties were plotted as a function of processing parameter, and optimum conditions were explored. SiC is an attractive light weight and structurally robust material that is resistant to high temperature and chemical reactivity. SiC parts and components are produced by compacting the
Thiagarajan. C. et al. [6] studied the grindability of Al/SiC metal matrix composites in cylindrical grinding process. Horizontal spindle cylindrical grinding machine with Al 2 O 3 grinding wheel is used for this experimental work. The experiments are carried out to study the effect of
The present research work involves investigating the cylindrical grinding process parameters of Al/SiC metal matrix composites during machining. The effect of grinding process parameters on grinding force, surface roughness and grinding temperature were investigated experimentally using L27 orthogonal array. Grinding process was carried out using different combination of …
The grinding process inevitably involves contact of the ore (minerals) with the surface of grinding device and the grinding medium. This not only causes wear, but also contamination of the ore with wear debris as well as with precipitated species on the ore surfaces, which this is often deleterious to copper flotation.
Monolayer brazed diamond wheel were used to grind AlSiC composite with different volume fraction of SiC. The effects of diamond mesh size of the grinding wheels and the volume fraction of SiC in AlSiC composite on the surface integrity of ground AlSiC composite were investigated. It is found that the surface roughness of ground AlSiC composite with 20% SiC is increased with …
Copper-based composites reinforced with 15–35 wt.% SiC were produced by mechanical alloying in a planetary mill and hot pressing.Grinded copper chips less than 5000 μm in size and 10 μm SiC particles were used as initial materials.Optical and scanning electron microscopes were used for microstructural analysis.
US4599827A US06/747,741 US74774185A US4599827A US 4599827 A US4599827 A US 4599827A US 74774185 A US74774185 A US 74774185A US 4599827 A US4599827 A US 4599827A Authority US United States Prior art keywords sample polishing grinding grit silicon carbide Prior art date Legal status (The legal status is an assumption and is not a …
It was found that the high-energy milling process leads to Cu-Al-SiC composite powders with a homogeneous distribution of the reinforcement in the matrix. ... Copper/silicon carbide composites (Cu ...
process, grinding process and diamond turning machining process is the most applied methods. ... properties of SiC [2,10, 12,20,22,24,26,27,30,31,33]. ... performances on SiC by using copper foil as elec-trode tool and compared with steel electrode tool
This paper deals with an experimental study on the grindability of Al/SiC metal matrix composites in cylindrical grinding. Machining of metal matrix composites (MMCs) is an area to be focused and finishing processes such as grinding to obtain a good surface finish and damage-free surfaces are crucial for the application of these materials. Nevertheless, grinding of MMCs …
Aluminium-(Silicon Carbide) is a metal-ceramic composite material consisting of silicon carbide particles dispersed in a matrix of aluminium alloy. 1.4 Stir Casting: To design a camshaft at low cost using Al-SiC composite we defined a method of reinforcing the SiC particulates at different percentage (4%, 8%, and 12%) to get different readings and
This paper deals with an experimental study on the grindability of Al/SiC metal matrix composites in cylindrical grinding. Machining of metal matrix composites (MMCs) is an area to be focused and finishing processes such as grinding to obtain a good surface finish and damage-free surfaces are crucial for the application of these materials. Nevertheless, grinding of MMCs …
SiC, TiC, B 4 C, -Al 2 O 3, SiO 2,-metals -lubricants Contents of grinding layers . Most important factor in a layer ... grinding process . Breakdown behaviour of ... copper alloy magnesium based alloy nickel based alloy titanium alloy
composite (MMC) of Al reinforced with SiC particulate (SiC ) with distinct Nano crystalline characteristics. Nano composites, aluminium reinforced with selected volume fractions, x (x=2, 5, 7, and 10) of particulate SiC were fabricated by milling elemental powders of Al and SiC in a high-energy ball mill at room temperature.
ing the grinding process. How to improve structure uni-formity is the key to prepare the wheel for ultra-precision grinding of SiC wafers. To avoid agglomeration of ultra-fine diamond particles and improve the surface rough-ness of silicon wafers, Miao et al.18 introduced a combi-nation of gel casting and pore-forming agent to fabricate
point of Al-Si/CNT/vapour. The SiC layer resulted in high interfacial adhesion strength between CNT and Al-Si matrix. Bakshi et al. (2008)prepared the Al-CNT composites with cold spraying. 5 wt.%CNT were blended with aluminium powder before cold spraying, which resulted in the composite coating of 500 μm.
Xu et al. analysed wear mechanism of three grinding wheels (made of Al 2O 3, SiC and CBN, respectively) in Ti6Al4V titanium alloy grinding process [10]. SEM micro-observations of the active grinding wheel surface indicated that adhering Ti6Al4V material can be seen on SiC grits when the machining temperature is raised up to 1000 °C.
The properties of. Al -SiC are notable such a s light weight, high st rength, high specific modulus, high fatigue strength, high hardness and low density [2]. One …
al. describes in detail the scientific aspects of ceramic abrasion processes. Some companies do not distinguish between grinding and polishing, as in the previous paragraph, but use the term lapping to mean grinding or coarse polishing with an abrasive slurry against a hard metal platen.
Co-molded articles such as abrasive grinding wheel structures having a polyimide resin-bonded phase and a metal-bonded phase are provided. A process also is provided for co-molding such structures by the simultaneous application of heat and pressure to an abrasive-containing rim of polyimide resin and a core of metal powder.
aluminium–silicon carbide–graphite composites," Materials and Design 31, 1804–1812. [3] Saravanan, S.D. et al, "Evaluation of Mechanical Properties of Aluminium Alloy 2024 Reinforced With Silicon Carbide and Fly Ash Hybrid Metal Matrix Composites.," Journal of Materials Processing Technology, 3(3), pp.219–229 (2013).
of SiC ceramics,"Journal of Materials Processing -3),p. 4084112002. [5] Yoshida, K., et al., "Mechanical properties of unidirectional and crossply SiCf/SiC composites using SiC fibers with carbon interphase formed by electrophoretic deposition process," Progress in Nuclear Energy,82,pp. 148-152., 2015.
SiC/Al and SiC/Gr/Al [9]. Mahdavi et al. (2011) showed that there is variation of the wear rates of Al/SiC and Al/SiC/Gr composites containing a range of SiC particle sizes at the sliding distances of 500 and 1000 m. They also gave the variation of the coefficient of friction in a range of composites with changes in the size of SiC particle [10].
lower tendency to clog the wheel. Z.W. Zhong et al [3] reports diamond grinding of aluminium based MMCs reinforced with either SiC or Al2O3 particles and concludes that grinding using diamond wheel at depths of cut of 1 or 0.5 µm produced ductile streaks on the Al2O3 particles and the SiC particles respectively and no
Silicon carbide, SIC, with a hardness of about 2,500 HV, is a widely used abrasive for grinding papers for mainly non-ferrous metals. Aluminium oxide, with a hardness of about 2,000 HV, is primarily used as an abrasive in grinding stones.
Al, Si and SiC powders having 99.9, 99.5 and 99.2% purities and ≥50, 30 and 0.2 μm particle sizes, respectively, have been provided from Sigma Aldrich and utilized as raw materials to prepare Al-20wt%Si-xSiC nanocomposites; where x = 0, 5, 10, 15 and 20 wt%). Stearic-acid (0.1%) was also used as a process-controlling-agent to avoid the aggregation of …
Fig. 3 Processing steps of Al 2O 3-SiC w-TiC Composite (Courtesy; Industrial Ceramic Technology, Inc, USA) Table 1 Physical and mechanical properties of Al 2O 3–SiC w–TiC (Patel et al. 2009a, 2009b, 2009c) Hardness (H v) Fracture toughness K IC (MPa (m) 0.5) Thermal conductivity k (W/mK at 400°K) Electrical Resistivity (Ωcm) Density ρ (g ...