Characterization of AISI 1020 steel carburized with variation of mass ratio between charcoal from Nypa fruticans shell and CaCO3 from chicken egg shell, in association with its mechanical properties

2021 ◽  
Author(s):  
Hizkia Alpha Dewanto ◽  
Rifqi Aulia Tanjung ◽  
Ade Wahyu Yusariarta Putra Parmita ◽  
Hizkia Erenst ◽  
Ryan Aditya Prayudi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mass Ratio ◽  
Chicken Egg ◽  
Nypa Fruticans ◽  
Egg Shell

scholarly journals Synthesis and characterization of the starch/silicone composite and elaboration of its films

2021 ◽  
Author(s):  
Coyolicaltzin Peralta-González ◽  
Aurelio Ramirez-Hernandez ◽  
Gustavo Rangel-Porras ◽  
Alejandro Aparicio-Saguilán ◽  
Andrés Aguirre-Cruz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Films ◽  
Sem Analysis ◽  
Synthesis And Characterization ◽  
Starch Granules ◽  
Mass Ratio ◽  
Synthesis Conditions ◽  
Packaging Industry ◽  
Potential Use

Abstract Synthesis of the starch/silicone composite carried out and its structural characterization by FTIR, Raman and 29Si NMR allowed to identify functional groups of the composite. The synthesis conditions were a starch/silicone mass ratio of 2.0 and a temperature of 150 oC to obtain a yield of 84.63 %. SEM analysis showed that the starch granules were covered by silicone, this caused a decrease in the crystallinity of starch. Composite films have higher thermal stability compared to native starch. Mechanical properties and electrical conductivity of the starch/silicone composite film increase with respect to starch-only films. While the crystallinity of both films is similar. The results obtained in this work indicate that starch/silicone composites can be an alternative to make films with a potential use for the packaging industry.

scholarly journals Mechanical and Microstructural Characterizations on Commercial and Synthesized by the Sol-Gel Method Using Chicken Egg Shells as Precursor Hydroxyapatite

2021 ◽  
Vol 2 (2) ◽  
pp. 1365-1374
Author(s):  
Marcelo Vitor Ferreira Machado ◽  
José Brant De Campos ◽  
Marilza Sampaio Aguilar ◽  
Vitor Santos Ramos
Keyword(s):  
Mechanical Properties ◽  
Vickers Microhardness ◽  
Sol Gel ◽  
Microstructural Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chicken Egg ◽  
Experimental Parameters ◽  
Egg Shells

The purpose of this work is to determine one of the most important mechanical properties of brittle materials, the hardness. Our work material is called hydroxyapatite (HAP), in this case, using chicken egg shells as precursor. Once considering the experimental parameters of force and time of the indentation, the Vickers microhardness measurements were obtained for both for HAP, synthesized from chicken egg shells and commercial hydroxyapatite for comparison purposes. The microstructural characterization of the materials, as well as their specimens, has been performed by the microscope scanning, x-ray diffraction and thermogravimetric analyses.

scholarly journals Effect of pack carburizing with chicken egg shell powder agent and vibrator quenching on the mechanical properties of AISI 9310 steel

2021 ◽  
Vol 6 (12 (114)) ◽  
Author(s):  
Sinarep Sinarep ◽  
Sujita Darmo
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cooling Rate ◽  
Surface Hardness ◽  
Specimen Surface ◽  
Hardness Number ◽  
Cooling Medium ◽  
Chicken Egg ◽  
Egg Shell ◽  
Shell Powder

The effects of vibrator quenching (QV) on the carbon content, microstructure, and mechanical properties (surface hardness number, wear resistance) in the pack carburizing of AISI 9310 steel were studied. The aim of this research is to increase the surface hardness and improve the wear resistance of AISI 9310 steel. The problem that often occurs in the quenching treatment after pack carburizing is that the thick cooling medium does not evenly wet the surface of the specimen, so that the cooling rate is not uniform, the impact is the distribution of the specimen surface hardness is not the same. Therefore, it is necessary to research the implementation of the vibrator in the quenching treatment.  The specimens were treated with pack carburizing at a temperature of 875 °C, soaking time for 3 hours. The carburizing agent consisted of chicken egg shell powder (CESP) and rice husk charcoal (RHC) with various weight ratios of 5 %:95 %, 15 %:85 %, and 30 %:70 %. Followed by quenching treatment using a 10 % cane molasses cooling medium and vibrator. Hardness testing was carried out using a Vickers microhardness tester, wear resistance test using the pin-on-disc method, and a scanning electron microscope (SEM-EDX) was used to observe changes in the microstructure and carbon elemental content on the specimen surface. The results showed that the application of VQ caused the formation of a small martensite microstructure while without VQ it was large martensite and a few of residual ferrite. The highest surface hardness number is 685 kg/mm2, the wear resistance is 0.32 cm/mg for pack carburizing, using carburizing agent 70 % RHC, 30 % CESP and VQ. VQ causes a more even distribution of the thick cane molasses cooling medium so that the cooling rate of the specimens is uniform.

Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

1989 ◽  
Vol 47 ◽  
pp. 562-563
Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Static Loading ◽  
Carbon Deposition ◽  
Full Density ◽  
Unique Combination ◽  
Strong Component ◽  
Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

Characterization of interfaces in CVD-coated nicalon fiber-reinforced SiC

1989 ◽  
Vol 47 ◽  
pp. 556-557
Author(s):  
K.L. More ◽  
R.A. Lowden
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Frictional Stress ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Carbon Coated ◽  
Fiber Matrix

The mechanical properties of fiber-reinforced composites are directly related to the nature of the fiber-matrix bond. Fracture toughness is improved when debonding, crack deflection, and fiber pull-out occur which in turn depend on a weak interfacial bond. The interfacial characteristics of fiber-reinforced ceramics can be altered by applying thin coatings to the fibers prior to composite fabrication. In a previous study, Lowden and co-workers coated Nicalon fibers (Nippon Carbon Company) with silicon and carbon prior to chemical vapor infiltration with SiC and determined the influence of interfacial frictional stress on fracture phenomena. They found that the silicon-coated Nicalon fiber-reinforced SiC had low flexure strengths and brittle fracture whereas the composites containing carbon coated fibers exhibited improved strength and fracture toughness. In this study, coatings of boron or BN were applied to Nicalon fibers via chemical vapor deposition (CVD) and the fibers were subsequently incorporated in a SiC matrix. The fiber-matrix interfaces were characterized using transmission and scanning electron microscopy (TEM and SEM). Mechanical properties were determined and compared to those obtained for uncoated Nicalon fiber-reinforced SiC.

PREPARATION AND CHARACTERIZATION OF REPROCESSED COMPOSITES OF POLYPROPYLENE REINFORCED BY WOOD FIBERS: PHYSICAL AND MECHANICAL PROPERTIES

2017 ◽  
Author(s):  
Thais Helena Sydenstricker Flores-Sahagun ◽  
Kelly Priscila Agapito ◽  
ROSA MARIA JIMENEZ AMEZCUA ◽  
Felipe Jedyn
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Wood Fibers

Emerging Techniques for the Characterization of Nano-Mechanical Properties of Integrated Circuit Components

2008 ◽  
Author(s):  
Nicholas Randall ◽  
Rahul Premachandran Nair
Keyword(s):  
Mechanical Properties ◽  
Quality Control ◽  
Integrated Circuits ◽  
Integrated Circuit ◽  
Manufacturing Process ◽  
Solder Bumps ◽  
Initial Work ◽  
Circuit Components ◽  
Materials Used

Abstract With the growing complexity of integrated circuits (IC) comes the issue of quality control during the manufacturing process. In order to avoid late realization of design flaws which could be very expensive, the characterization of the mechanical properties of the IC components needs to be carried out in a more efficient and standardized manner. The effects of changes in the manufacturing process and materials used on the functioning and reliability of the final device also need to be addressed. Initial work on accurately determining several key mechanical properties of bonding pads, solder bumps and coatings using a combination of different methods and equipment has been summarized.

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