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.  

Selection of Overlays for Single Crystal Shrouded Turbine Blades

2002 ◽  
Author(s):  
Irene Nava ◽  
Douglas Nagy
Keyword(s):  
Powder Metallurgy ◽  
Turbine Blades ◽  
Repair Process ◽  
Powder Metallurgy Process ◽  
Binder Ratio ◽  
Oxidation Properties ◽  
Processing Techniques ◽  
Ratio Optimization ◽  
Metallurgy Process ◽  
Selection Of

Solar Turbines Incorporated (Solar) is investigating innovative turbine designs that will allow higher electrical efficiency and output power. Liburdi Engineering Limited (Liburdi) and Solar have evaluated the application of a powder metallurgy process based upon the Liburdi Powder Metallurgy (LPM™) repair process. The technique applies a chrome carbide and nickel-chrome alloy composite hardfacing onto a turbine blade’s Z-notches. Processing techniques (such as material form, alloy-hardface ratio optimization, binder ratio and heat treatment cycles) were investigated (some of the details developed at Liburdi are proprietary). Metallurgical, mechanical and short-term oxidation properties of the composite have been studied and defined by Solar. The LPM process was found to be feasible and practical to be applied on CMSX-4 single-cystal Z-notches of shrouded blades.

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.

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.

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