scholarly journals Pengaruh Waktu Pencampuran terhadap Kekerasan Vickers Material Crucible Berbahan Limbah Evaporation Boats, Kaolin dan Semen Tahan Api

2021 ◽  
Vol 12 (2) ◽  
pp. 325-330
Author(s):  
Sandy Triyanto ◽  
◽  
Rusiyanto Rusiyanto ◽  
Rahmat Doni Widodo ◽  
Samsudin Anis ◽  
...  
Keyword(s):  
Test Specimen ◽  
Hardness Test ◽  
Mixing Process ◽  
Compaction Process ◽  
Crucible Material ◽  
Electrically Conductive ◽  
Refractory Cement ◽  
Conductive Properties ◽  
Test Process ◽  
Cylindrical Test

Evaporation boat waste contains Boron Nitride (BN) and Titanium Diboride (TiB2) so that it has electrically conductive properties with high resistance to chemicals and heat. In addition, the combination of these materials has high thermal conductivity properties with a melting point of up to 2700oC and has an oxidation resistance of up to 1000oC so it is very suitable if applied to crucibles, or refractory. The purpose of this study was to determine the effect of mixing duration on the hardness of the crucible material made from a mixture of evaporation boats waste, kaolin and fire mortar SK-34. The mixing process of evaporation boats waste, kaolin and refractory cement is carried out using a mixer machine with a duration of 30, 60 and 90 minutes. The compaction process was carried out on the mixture with a force of 40 kg/cm2 to produce a cylindrical test specimen. After seven days, the specimens were sintered at 1000oC for 2 hours. The hardness test process was carried out with the FM-800 microhardness tester machine to determine the effect of mixing duration on the final product hardness. The highest hardness of 37,2 HV was found in the final product with a mixing duration of 90 minutes. The hardness of final product is increasing with an increase in mixing duration.

Possibilities of Utilization of Waste Materials in Production of Electrically Conductive Composites on Silicate Basis

2021 ◽  
Vol 321 ◽  
pp. 171-176
Author(s):  
Jana Majerová ◽  
Rostislav Drochytka
Keyword(s):  
Nickel Powder ◽  
Cement Composite ◽  
Wire Drawing ◽  
Waste Materials ◽  
Electrically Conductive ◽  
Conductive Composites ◽  
Steel Wires ◽  
The Subject ◽  
Conductive Properties ◽  
Functional Fillers

The electrical conductivity of concrete can be achieved by adding steel wires or functional fillers. Commonly used fillers are nanotubes, carbon black, nickel powder and so on. These fillers are expensive, but there is a possibility to use waste materials. This is the subject of this experiment. The conductive properties of conductive sand, sludge from the wire drawing process, iron grinding dust waste and waste carbon were verified. From these fillers, waste carbon showed the best electrical properties (impedance). The impedance of the waste carbon was 0.31 Ω and the impedance of the cement composite containing 70% of the weight of waste carbon was less than 670 Ω.

scholarly journals KARAKTERISTIK SIFAT MEKANIS ANTARA TIGA PRODUK MANUFAKTUR ELEKTRODA E6013

2019 ◽  
Vol 3 (1) ◽  
pp. 40-45
Author(s):  
Basori Basori ◽  
Ferry Budhi Susetyo
Keyword(s):  
Impact Strength ◽  
Test Specimen ◽  
Impact Test ◽  
Surface Hardness ◽  
Welding Process ◽  
Hardness Test ◽  
Bottom Plate ◽  
Weld Deposit ◽  
Welding Electrode ◽  
The Impact

The type of electrode used in the SMAW process has many types, such as E 6010, E 6011, E 6012, E 6013, E 6020, E6027. In this case the type E 6013 is the most widely used. Certainly the type E 6013 is produced by different manufacturers as well. From penelurusan researchers of this type have different prices in accordance with companies that sell it. For that reason researchers are interested to compare the three manufacturing outputs for the type E 6013 in terms of its mechanical properties. Making a specimen welding electrode cut material to be used. then sandpaper the material that has been cut so that no remaining pieces are still attached. The next step to do the welding process with three types of E6013 elekroda. The welding is carried out until it reaches the layer layer 10 mm thickness, then the bottom plate is discarded and the weld deposit deposits only The impact strength and surface hardness value are inversely proportional. For the impact test, the E1 electrode sample specimen has the highest impact strength value and the E3 electrode sample specimen has the lowest impact strength value. While on the hardness test specimen E3 electrode sample has the highest hardness value and sample specimen E1 electrode has the lowest hardness value. This can prove that the harder the object is the more brittle the object.

scholarly journals Justification of the active method of protecting the insulation of submersible electric motors

2019 ◽  
Vol 124 ◽  
pp. 02003
Author(s):  
V. A. Trushkin ◽  
O. N. Churlyaeva ◽  
R. V. Kozichev
Keyword(s):  
Physical Properties ◽  
Electrical Breakdown ◽  
Electrical Equipment ◽  
Working Environment ◽  
Operating Parameters ◽  
Insulation Resistance ◽  
Electric Motors ◽  
Electrically Conductive ◽  
Active Method ◽  
Conductive Properties

The article provides an analysis of the properties of the working environment of submersible electrical equipment. The influence of the operating parameters of electrical equipment on the physical properties of the fluid (its electrically conductive properties) is considered. Mathematical confirmation of the implementation of electroosmosis in the capillaries of the insulation of submersible electric motors is given. The rationale for the active method of protecting submersible electrical equipment from reducing insulation resistance and preventing electrical breakdown is given.

Analysis of Densification Process and Structure of PM Al-Mg-Si-Cu-Fe and Al-Zn-Mg-Cu-Sn Alloys

2014 ◽  
Vol 59 (1) ◽  
pp. 17-23 ◽  
Author(s):  
R. Bidulský ◽  
J. Bidulská ◽  
M. Actis Grande
Keyword(s):  
Test Specimen ◽  
Hardened Steel ◽  
Pressing Pressure ◽  
Metal Powders ◽  
Compaction Process ◽  
Cylinder Test ◽  
Die Compaction ◽  
Uniaxial Compaction ◽  
Compaction Behaviour

Abstract The paper is focused on the role of the pressing pressure on the densification behaviour of PM aluminium alloys. Commercially aluminium based powders Al-Mg-Si-Cu-Fe and Al-Zn-Mg-Cu-Sn were used as materials to be investigated. The apparent density of the powder mixes was determined according to MPIF St. 04. A set of cylinder test specimen 55x10x10 mm3 was uniaxially pressed in a floating hardened steel die. Compaction pressures ranged from 50 MPa up to 700 MPa. Considering the densification of metal powders in uniaxial compaction, quantification of aluminium compaction behaviour was performed. The compressibility behaviour was evaluated, considering the effect on specimens, as well as on their microstructure. The development of compressibility values with pressing pressure enables to characterize the effect of particles geometry and matrix plasticity on the compaction process.

scholarly journals Design and Development of an E-Textile Mat for Assuring the Comfort of Bedridden Persons

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5437
Author(s):  
Daniela Sofronova ◽  
Radostina A. Angelova ◽  
Yavor Sofronov
Keyword(s):  
Body Position ◽  
Production Method ◽  
High Wear Resistance ◽  
Continuous Control ◽  
Decubitus Ulcers ◽  
New Production ◽  
Electrically Conductive ◽  
Software Application ◽  
Non Invasive ◽  
Conductive Properties

An e-textile mat with capacitive textile sensors was designed and manufactured to monitor body position and prevent decubitus ulcers in the case of bedridden people. The sensors were incorporated through a process of machine embroidery with electrically conductive threads. A new production method for the conductive threads is still expected to be developed, resulting in good conductive properties, high wear resistance and durability. Samples of five variants of motifs without cross-stitching were studied, and the capacity and electrical resistance were determined experimentally. A prototype of the e-textile mat was made with a motif showing the best ratio between the inserted thread and the measured capacity. A hardware solution and a software application for collecting, processing and visualising the received information were developed. Tests were performed in real conditions, which clearly showed that the designed e-textile mat could be successfully applied for non-invasive and continuous control of the position of the human body in a supine position to prevent decubitus ulcers.

scholarly journals Research of crack initiation in tension test specimen made of nickel alloy EI961sh

2018 ◽  
Vol 165 ◽  
pp. 22027
Author(s):  
Kamaliddin Karimbaev ◽  
Ivan Pleshcheev ◽  
Elena Bredihina
Keyword(s):  
Cross Sections ◽  
Test Specimen ◽  
Plastic Material ◽  
Tensile Tests ◽  
Deformation Energy ◽  
Experimental Fact ◽  
Conservation Of Energy ◽  
Software Complex ◽  
The Moment ◽  
Cylindrical Test

In this paper method of numerical computations using explicit scheme, implemented in LSDyna (Ansys) software complex, is introduced and verified. Obtained solution explains experimental fact mentioned by P. Ludwik, that cracking in cylindrical test specimen made of plastic material starts in the middle of the smallest cross-section of the specimen. Introduced method allows verifying law, obtained by N.N. Davidenkov during unique experimental research in which he studied logarithmic strain in specimen’s neck by pickling of cross-sections in this zone. Additionally it is possible to estimate amount of heat, generated during rupture of specimen, using obtained solution and law of conservation of energy. For this purpose tensile tests, in which thermal camera was used for temperature measuring, were conducted. It was shown, that all deformation energy apart from elastic and shape-forming energy in volume element, calculated in the moment before rupture is transformed to heat. Also tensile tests with various rate of loading were conducted for more detailed research of rupture process.

Directed Regulation and Localization of Electrical Properties for Composite Construction Materials

2021 ◽  
Vol 325 ◽  
pp. 119-124
Author(s):  
Aleksandr Nikolaevich Gumenyuk ◽  
Irina Sergeevna Polyanskikh ◽  
Igor Aleksandrovich Pudov ◽  
Philip Evgenyevich Shevchenko ◽  
Natalia Vilorievna Kuzmina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Construction Materials ◽  
Electrical Current ◽  
Dielectric Behavior ◽  
Electrically Conductive ◽  
Copper Electrodes ◽  
It Efficiency ◽  
Conductive Properties ◽  
First Time ◽  
Corrosive Resistance

Research results of modified composites which consist of isolated layers with different properties and their practical usages are represented in this article. A structure of the composite material is considered. The structure is combined of few layers; external layers are made of corrosive resistance material with dielectric behavior while the internal part of the composite is made of electrically conductive material with high conductive and mechanical properties. Conductive properties of each layer have been measured as well as their mechanical properties and structure. Also, the features of the joints between layers in terms of structure and properties were defined. More than that, varieties of mixtures and their possible usage are considered. Conductive properties of composite materials and ways of their adjustment have been described as well. For the first time, the measuring scheme of conductive properties for each layer was offered and heat shrinkable tubes and copper electrodes were used for it. Efficiency of modified composites and its behavior when electrical current applied can be measured by using the scheme.

Fabrication of polyaniline/polyimide composite fibers with electrically conductive properties

2016 ◽  
Vol 367 ◽  
pp. 335-341 ◽  
Author(s):  
Pengxia Lv ◽  
Yong Zhao ◽  
Fangfang Liu ◽  
Guomin Li ◽  
Xuemin Dai ◽  
...  
Keyword(s):  
Composite Fibers ◽  
Electrically Conductive ◽  
Conductive Properties
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