Optimization of Warm Compaction Process Parameters in Synthesizing Carbon-Copper Composite Using Taguchi Method

2016 ◽  
Vol 701 ◽  
pp. 112-116
Author(s):  
Salina Budin ◽  
Mohd Afiq Nurul Hadi ◽  
Talib Ria Jaafar ◽  
Mohd Asri Selamat
Keyword(s):  
Powder Metallurgy ◽  
Taguchi Method ◽  
Rupture Strength ◽  
Compaction Pressure ◽  
Compaction Process ◽  
Compaction Temperature ◽  
Warm Compaction ◽  
Copper Composite ◽  
Best Parameters ◽  
Powder Metallurgy Route

Carbon–copper composites are attractive materials used for electrical applications, such as brushes for engines and generators, slip rings, switches, relays, lugs, contactor and current collector. Various methods can be used to prepare Carbon-copper composite, such as infiltration, sintering, cold pressing, hot pressing or isostatic pressing. However, powder metallurgy route is seen to be most favorable due to its possibility of producing uniform microstructure and excellent net shape product. In this work, carbon-copper composite is prepared using powder metallurgy route with warm compaction process. The compaction pressure (A), compaction temperature (B), post baking temperature (C) and compaction time (D) were optimized by Taguchi method. Hardness and transverse rupture strength (TRS) were used to assess the effect of warm compaction process. The experimental design is according to the L9 (34) orthogonal array. Signal to noise and analysis of variance (ANOVA) are employed to analyze the effect of warm compaction parameters. It is found that the best parameters and their levels are A3B2C3D2 for the main effect of hardness and the best parameters and their levels for TRS is A3B2C3D1. It is also notified that optimized parameters of A3, B2 and C3 are identical for hardness and TRS. However, for parameter D, the best level for hardness is D2 and for TRS is D1. The ANOVA analysis proved that compaction temperature parameter is significant to hardness and TRS value whereas the others parameters are not significant.

Compaction Optimization of Sn-Cu-Si3N4 via Powder Metallurgy Route for Composite Solder Fabrication

2013 ◽  
Vol 421 ◽  
pp. 267-271
Author(s):  
Muhammad Hafiz Zan Hazizi ◽  
M.A.A. Mohd Salleh ◽  
Zainal Ariffin Ahmad ◽  
A.M. Mustafa Al Bakri ◽  
A. Abdullah ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Mechanical Alloying ◽  
Composite Solder ◽  
Compaction Pressure ◽  
Compaction Process ◽  
Thin Disc ◽  
Best Parameter ◽  
Porosity Percentage ◽  
Powder Metallurgy Route

The aim of this study was to optimize the compaction process of a composite solder fabricated via powder metallurgy route, before details study were conducted in the next stage. Powder of Sn, Cu and Si3N4 were carefully weighted, mixed and blended in a mechanical alloying machine. Si3N4 were added to the Sn-0.7Cu solder as reinforcement.After 6 hours of mixing and blending, the powders were later compacted into a thin disc at 5 different pressures. Densities and volumes of the compacted samples were then obtained by using MicromeriticsAccuPyc II 1340 Gas Pycnometer. All data were analyzed and compared with each other in order to select the best parameter for compaction pressure. Results showed that at 140 bars, the porosity percentage is the lowest. Hence, it was decided that 140 bars is the best parameter for compaction process.

Preparation of Fe-Cu-Ni-Mo-C Alloy with High Performance by Powder Metallurgy Warm Compaction

2011 ◽  
Vol 194-196 ◽  
pp. 100-103 ◽  
Author(s):  
Jun Sheng Huang ◽  
Sheng Min
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
High Performance ◽  
Sintered Density ◽  
Surface Composition ◽  
Compaction Pressure ◽  
Compaction Temperature ◽  
Warm Compaction ◽  
Crack Morphology ◽  
Ammonia Atmosphere

Fe-1.5Cu-1.5Ni-0.5Mo-0.3C alloy was prepared by powder metallurgy (P/M) warm compaction. Under the conditions of compaction pressures of 600 or 800 MPa and compaction temperature of 100 or 120°C , sintered in cracked ammonia atmosphere at 1120°C for half an hour, the researched alloy samples with higher properties could be prepared. The results show: when formed at a compaction pressure of 800 MPa and compaction temperature of 120°C , the alloy presented a sintered density 7.41g/cm3, hardness 88HRB, ultimate tensile strength 593MPa， yield strength 585MPa, and elongation 3.8%. Their mechanical properties, crack morphology and surface composition weres analyzed.

Use of Cenosphere for Making Metal-Microspheres Syntactic Foam through Powder Metallurgy Route

2015 ◽  
Vol 830-831 ◽  
pp. 75-79
Author(s):  
D.P. Mondal ◽  
R. Dasgupta ◽  
Ajay Kumar Barnwal ◽  
Shaily Pandey ◽  
Hemant Jain
Keyword(s):  
Powder Metallurgy ◽  
Relative Density ◽  
Uniform Distribution ◽  
Compaction Pressure ◽  
Syntactic Foam ◽  
Syntactic Foams ◽  
Plateau Stress ◽  
Stress Energy ◽  
Strength And Stiffness ◽  
Powder Metallurgy Route

Cenospheres are very cheap, and are reasonably strong and thermally stable upto 1200°C. In view of this attempt has been made to use these cenosphere for making Titanium syntactic foams with varying relative densities. Precautions were taken for selecting cold compaction pressure to minimize cenosphere crushing. The sintered samples were then characterized in terms of microstructures primarily to see the extent of cenosphere crushing, distribution of cenosphere, and extent of sintering. The foams made using optimized pressure and sintering parameters, exhibits uniform distribution of cenosphere without any significant crushing. The plateau stress, energy absorption and modulus of these foams are varying with the cenosphere content or the relative density, and these parameters can be engineered by varying cenosphere content in the foam. These foams exhibit considerably higher strength and stiffness than the conventional foam and show the possibility of using them for biomedical and engineering applications.

Experiment and Modeling Study on the Compaction Behavior of Bindered Textile Preforms

2012 ◽  
Vol 268-270 ◽  
pp. 148-154
Author(s):  
Wang Qing Wu ◽  
Bin Yan Jiang ◽  
Lei Xie ◽  
Gerhard Ziegmann
Keyword(s):  
Taguchi Method ◽  
Volume Content ◽  
Compaction Pressure ◽  
Binder Content ◽  
Activation Time ◽  
Fiber Volume ◽  
Activation Temperature ◽  
Compaction Temperature ◽  
Compaction Behavior ◽  
Modeling Study

The effect of compaction and preforming parameters on the fiber volume content of bindered textile preforms during a compaction experiment was investigated by using Taguchi method. Four compaction and preforming parameters of compaction temperature, binder activation temperature, binder content and binder activation time were selected and optimized with respect to the fiber volume content at specified compaction pressure (0.2 MPa). The results reveal that the compaction behavior of bindered textile preforms has significantly influenced due to the presence of binder. The fiber volume content during compaction was correlated with the compaction and preforming parameters using a modified four-parameter-compaction-model which has been proposed for describing the compaction behavior of bindered textile preforms.

Warm Compression of Al Alloy PM Blends

2007 ◽  
Vol 534-536 ◽  
pp. 333-336 ◽  
Author(s):  
Z. Jiang ◽  
C. Lucien Falticeanu ◽  
I.T.H. Chang
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Al Alloy ◽  
Compaction Process ◽  
Warm Compaction ◽  
Aluminium Powder ◽  
Automotive Parts ◽  
The Subject ◽  
Overall Performance ◽  
Conventional Press

With the onging trend of reducing the weight of automotive parts, there is also an increasing trend in the use of light alloys. Recently, aluminum powder metallurgy has been the subject of great attention due to the combination of the lightweight characteristics of aluminium and the efficient material utilisation of the powder metallurgical process, which offer attractive benefits to potential end-users. Conventional press and sinter route of non-ferrous P/M products are based compaction at room temperature prior to the sintering cycle. However, warm compaction process has successfully provided increased density in ferrous powder metallurgy parts, which contributes to better mechanical properties and consequently overall performance of those parts. This study is aimed at exploring the use of warm compaction process to aluminium powder metallurgy. This paper presents a detailed study of the effect of warm compression and sintering conditions on the resultant microstructures and mechanical properties of Al-Cu-Mg-Si PM blend.

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