نتایج جستجو برای: pin on disk test method
تعداد نتایج: 9346695 فیلتر نتایج به سال:
In this research, the wear behavior of commercial grades of WC-10wt%Co (H10F), WC-40vol%Co and WC-40vol%FeAl-B composites with different amounts of boron from zero to 1000 ppm has been investigated by the pin on disk test method at high temperature. The wear tests were done under load of 40 N, a distance of 100 m and at ambient temperature, 200 ̊C and 300 ̊C. Wear surfaces were examine...
In this study, advanced open-cell porous AlSi10Mg-Al2O3 composites have been successfully fabricated by replication of NaCl space holders. The tribological behavior under dry sliding conditions at room temperature with different pore sizes was studied via the pin-on-disk method, and wear parameters, such as coefficient friction (COF) mass wear, were determined. Micro-hardness tests performed to...
Background: One of the most common complaints in patients during the pin is removed from the metacarpal bone fracture is pain. Topical warm and cold therapy have effects on the skin, so that it can relieve pain. On the other hand, according to traditional Chinese medicine, the Hoku point is the most important pain point in the body. The aim of this study was to compare the effect of cold and wa...
The ambition of this research work is to evaluate the hardness and wear behavior titanium alloy reinforced with tungsten carbide particle (WC) composite prepared by powder metallurgy route. Titanium 5 10 wt% composites was manufactured through technique. properties are measured in tests. microstructures evaluated utilized optical microscopy. fabricated exhibit improved resistance. specimens wer...
abstract the current study set out to address the issue as to whether the implementation of portfolio assessment would give rise to iranian pre-intermediate efl learner autonomy. participants comprised 60 female in pre-intermediate level within the age range of 16-28.they were selected from among 90 language learners based on their scores on language proficiency test -key english test. then, t...
for any educational program to be successful, many factors work hand in hand. based on pervious efl studies, teachers and learners are the keys to gain achievement. granted the fact that explicit and implicit practice plays a key role in education, knowledge of it can help teachers facilitate students’ vocabulary learning. this study investigated to determine the contribution of explicit and i...
Ledeburitic tool steel X210Cr12 was processed by passing through a semi-solid state with subsequent forming on hydraulic press, thus achieving fine-grained martensitic matrix, uniformly dispersed fine precipitates, and removal of sharp-edged primary chromium carbides. The hardness value over 700 HV10. decomposition austenite the promotion further carbide precipitation were carried out cryogenic...
Brake pads are generally made of asbestos, which is less environmentally friendly and widely available in nature, therefore motorcycle brake that utilize palm frond fibers filled with alumina powder bonded to a polyurethane matrix. This research was conducted at the Laboratory Material Testing Industrial Chemical Technology Polytechnic (PTKI) Medan. Research carried out from February-July 2020,...
This study investigates the mechanical properties and wear behavior of Al 7075/Al2O3/SiCNP composites. The hybrid composites are manufactured using stir casting technique. In this work, 7075 alloy is reinforced with five different weight fractions Al2O3 a constant SiCNp, an average particle size 50 nm. aluminum metal matrix examined through surface morphology X-ray diffraction (XRD) patterns to...
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