Effects of Sintering Temperature on Microstructure and Wear Properties of Al2O3 Particle Reinforced Al Composites

2015 ◽  
Vol 1095 ◽  
pp. 16-19
Author(s):  
Tian Guo Wang ◽  
Qun Qin ◽  
Qi Chao Liang
Keyword(s):  
Sintering Temperature ◽  
Interfacial Bonding ◽  
Tribological Characteristic ◽  
Wear Properties ◽  
High Relative Density ◽  
Powder Metallurgy Process ◽  
Higher Temperature ◽  
Strong Interfacial Bonding ◽  
Metallurgy Process ◽  
Poor Interfacial Bonding

Al2O3 particle reinforced aluminum composites were prepared by powder metallurgy process. The effects of sintering temperature on microstructure and tribological characteristic were investigated with the combination of experimental results and theoretical analysis. The composite sintered at 550 oC shows high relative density and strong interfacial bonding, whereas the composites sintered at lower and higher temperature indicate no interfacial bonding and poor interfacial bonding, respectively. The surface morphology observed by scanning electron microscopy (SEM) indicated that the grains of the Al-based composites sintered at 550 oC were uniform and compact, which were in agreement with the properties of high density and tribological properties.

scholarly journals A Study on Mechanical and Tribological Properties of Aluminum 7075 MMCS Reinforced with Silicon Carbide and Coconut Husk by Powder Metallurgy Process

2021 ◽  
Vol 7 (09) ◽  
pp. 84-90
Author(s):  
Syed Gous Pasha and B.S Motgi
Keyword(s):  
Silicon Carbide ◽  
Wear Properties ◽  
Mechanical And Tribological Properties ◽  
Coconut Husk ◽  
Powder Metallurgy Process ◽  
Al 7075 ◽  
New Material ◽  
Aluminum 7075 ◽  
Aluminum Alloy 7075 ◽  
Metallurgy Process

The metal matrix composite strengthened with ceramic material of silicon carbide has smart mechanical characteristics. Metal-based composites, however, demand progress in their friction and tribological characteristics. In this work-study an effort is made to design a completely new material through the method of metallurgy by adding Coconut husk. This study explored the effect of coconut husk on the tribological behavior of hybrid composite Al 7075/5 wt. % Sic/Xwt. %coconut husk(X=6,4 and0).The research confirms the performance of wear properties by incorporating coconut husk into the composite. The sic-coconut husk reinforced Al 7075 (aluminum alloy 7075) was studied. Metallurgy route was used to prepare the composites. Microstructures, the mixture of materials, wear and wear resistance properties were analyzed by optical micro cope and scanning electron microscope.

scholarly journals Designing Powder Metallurgy Process - The Influence of High Sintering Temperature on Dimensional and Geometrical Precision

2021 ◽  
pp. 3-8
Author(s):  
Marco Zago ◽  
Ilaria Cristofolini ◽  
Sasan Amirabdollahian
Keyword(s):  
Powder Metallurgy ◽  
Sintering Temperature ◽  
The Real ◽  
Dimensional Changes ◽  
Dimensional Precision ◽  
Geometrical Characteristics ◽  
Powder Metallurgy Process ◽  
Sintered State ◽  
Metallurgy Process ◽  
Careful Design

AbstractThe precision of parts produced by Powder Metallurgy (PM) strongly depends on the careful design of PM process parameters. Among them, high sintering temperature is generally considered as detrimental for dimensional and geometrical precision, and therefore neglected in industrial production. Nevertheless, high sintering temperature would strongly improve mechanical characteristics of PM parts, so that the real influence of high sintering temperature on dimensional and geometrical precision is of great interest for PM companies. This study investigates the influence of sintering temperature (up to 1350 °C) on dimensional and geometrical precision of real parts. Dimensional changes on sintering and the effect of sintering temperature have been evaluated. Geometrical characteristics have been measured both in the green and in the sintered state, and the real influence of sintering temperature has been highlighted. As a conclusion, it has been demonstrated that the larger shrinkage due to the high sintering temperature is not detrimental with respect to the dimensional precision, being it reliably predictable. Moreover, the influence on geometrical characteristics is unexpectedly low. The encouraging results of this study convinced the main PM companies in Europe to further investigate the influence of high sintering temperature, as partners in a Club Project within the European Powder Metallurgy Association (EPMA).

Hardness, Density and Porosity of Al/(SiCw+Al2O3p) Composite by Powder Metallurgy Process without and with Sintering

2015 ◽  
Vol 776 ◽  
pp. 246-252 ◽  
Author(s):  
Ketut Suarsana ◽  
Rudy Soenoko
Keyword(s):  
Powder Metallurgy ◽  
Test Specimen ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Sem Analysis ◽  
Holding Time ◽  
Sintering Process ◽  
Interface Bonding ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

Al/(SiCw+Al2O3p) composite was a blend of fine aluminum powder serving as a matrix while Silicon Carbid whiskers (SiCw) and Alumina (Al2O3p) as a reinforcement. Powder metallurgy was used for the manufacture of composites according to the shape of the test specimen. Parameter testing was conducted with varied sintering holding time of 1 h, 3 h and 6 h at a sintering temperature of 500°C and 600°C. This study was conducted to know hardness properties, density, porosity and SEM analysis. The results show that the sintering process which has been conducted affects the physical and mechanical properties of the composite. Increased hardness and density occur due to the stronger or more dense interface bonding between matrix and reinforcement which are affected by the increase in the holding time and sintering temprature, where the highest is at 6 hours with 600°C, while the porosity decreases inversely proportional to the density and the hardness that occur in composite materials.

The Current-Carrying Tribological Properties of Cu/Graphene Composites

2021 ◽  
Vol 143 (10) ◽  
Author(s):  
Jing Zhao ◽  
Yitian Peng ◽  
Qianguang Zhou ◽  
Kun Zou
Keyword(s):  
Tribological Properties ◽  
Applied Load ◽  
Friction Reduction ◽  
Wear Properties ◽  
Electrical Stability ◽  
Low Friction ◽  
Sliding Speed ◽  
Contact Stability ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

Abstract Excellent current-carrying tribological properties including the low-friction, high anti-wear, high current-carrying efficiency, and stability are important for the current-carrying application in transmitting electrical signals and power. Here, the Cu/graphene composites with graphene uniformly distributed in Cu matrix were successfully prepared by combining the electroless plating process and powder metallurgy process. The current-carrying tribological properties including friction, wear, and electrical stability of the Cu/graphene composites with brass pairs were investigated by varying normal applied load and sliding speed under multiple applied voltages. The friction reduction and anti-wear properties of Cu/graphene composites were enhanced by the introduction of graphene. The friction coefficient of the Cu/graphene composites keeps stable under current-carrying and non-current-carrying conditions due to the benefit of the graphene enhancement to Cu. The graphene on wear surface reduces friction force and wear. The current-carrying efficiency and stability increased with the increase of applied load but decreased with increasing sliding speed. The contact stability increased with applied load, while high sliding speed caused the drastic vibration of sliding contact. The studies can provide a beneficial guideline for the current-carrying applications of Cu/graphene composites to reduce the friction and wear.

scholarly journals Kekerasan Produk Metalurgi Serbuk Berbahan Limbah Aluminium dengan Metode Kompaksi Bertahap

2021 ◽  
pp. 141-146
Author(s):  
IGAK Chatur Adhi WA ◽  
Anak Agung Alit Triadi ◽  
Made Wijana ◽  
I Made Nuarsa ◽  
I Made Mara
Keyword(s):  
Powder Metallurgy ◽  
Sintering Temperature ◽  
Carbide Powder ◽  
Metal Powders ◽  
Hardness Tests ◽  
Powder Metallurgy Process ◽  
Mixed Material ◽  
Metallurgy Process ◽  
Single Material ◽  
Selection Of

The product resulting from the powder metallurgy process has advantages in terms of mechanical properties and physical properties. Material engineering by mixing several types of metal powders is very possible to do. The composition of this powder metallurgical process material is a mixture of aluminum powder (80%), copper powder (15%) and silicon carbide powder (5%) by weight then compacted with a compaction load gradually, starting with a load of 3 tons, holding for 3 minutes, followed by a load of 3 tons. 4 tons were held for 3 minutes and the last 5 tons were held for 3 minutes by pre sintering 1250C. Sintering in the  kitchen with temperature variations of 4500C, 5000C and 5500C and sintering time for 60 minutes. Tests carried out on the specimens were hardness tests using the Rockwell (HRF) method. The results showed that the hardness of a single material has a hardness of around 35 HRF. The average hardness of the mixed material at a sintering temperature of 4500C is 80 HRF. The hardness of the mixed material at a sintering temperature of 5000C on average is 74 HRF. Meanwhile, the hardness of the mixed material at a sintering temperature of 5500C averaged 52 HRF. It can be concluded that the application of heat at the time of compaction and the selection of the sintering temperature greatly affect the hardness of the product resulting from the powder metallurgy process.  

scholarly journals Effect of Sintering Temperature on Microstructure and Hardness of SiC and Fly Ash Reinforced Copper Matrix Composite

2019 ◽  
Vol 9 (1S4) ◽  
pp. 930-933
Keyword(s):  
Fly Ash ◽  
Powder Metallurgy ◽  
Matrix Composite ◽  
Sintering Temperature ◽  
Compaction Pressure ◽  
Copper Matrix ◽  
Powder Metallurgy Process ◽  
Copper Matrix Composite ◽  
Metallurgy Process ◽  
Processing Of Composites

Copper based composites with SiC and Fly ash as reinforcement is prepared by powder metallurgy process. During processing of composites the compaction pressure is maintained as 400MPa for all combination of materials. The prepared green compacts were sintered on both 700℃ and 900℃ and the results microstructure and hardness obtained through Brinell harness test were compared.

CARPENTER CTS-204P ALLOY (MICRO MELT 20-4)

Alloy Digest ◽  
2010 ◽  
Vol 59 (1) ◽  
Keyword(s):  
Wear Resistance ◽  
Volume Fraction ◽  
Cold Work ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Corrosion Resistant ◽  
Die Steel ◽  
Powder Metallurgy Process ◽  
Wear And Corrosion ◽  
Metallurgy Process

Abstract Carpenter CTS-204P (Micro Melt 20-4) alloy is a highly wear- and corrosion-resistant, air-hardening martensitic cold-work stainless die steel produced using Carpenter’s Micro-Melt powder metallurgy process. The excellent wear resistance of the alloy is provided by a significant volume fraction of hard vanadium-rich carbides, while the outstanding corrosion resistance of the alloy is obtained as a result of the chromium-rich matrix. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on corrosion and wear resistance as well as forming, heat treating, and machining. Filing Code: SS-1051. Producer or source: Carpenter Specialty Alloys.

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