preparation of materials for experimentation
Báo cáo "Monte carlo simulation by code of MCNP and experimental check for measuring thickness of materials for the specializing system of MYO-101 " ppt
... backscattering effect of gamma-ray in the case of the dedicated system of MYO-101 with using scintillation detector of Yap(Ce) From the initial results performed for several materials such as white ... respectively) to be placed in the scintillation detector of Yap(Ce) of the dedicated system of MYO-101 are carried out for measuring thickness of light materials (such as white paper, yellow paper, plastic, ... activity of 370 MBq (10 mCi) in a disk shape (having overall diameter of mm, overall thickness of mm, active diameter of 4.2 mm, beryllium window with thickness of mm) is placed in well of the...
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Báo cáo nghiên cứu khoa học: "Monte carlo simulation by code of MCNP and experimental check for measuring thickness of materials for the specializing system of MYO-101" pptx
... backscattering effect of gamma-ray in the case of the dedicated system of MYO-101 with using scintillation detector of Yap(Ce) From the initial results performed for several materials such as white ... respectively) to be placed in the scintillation detector of Yap(Ce) of the dedicated system of MYO-101 are carried out for measuring thickness of light materials (such as white paper, yellow paper, plastic, ... activity of 370 MBq (10 mCi) in a disk shape (having overall diameter of mm, overall thickness of mm, active diameter of 4.2 mm, beryllium window with thickness of mm) is placed in well of the...
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Handbook of Materials for Product Design Part 1 pptx
... including the Society of Plastics Engineers, American Society for Materials, and the Society for the Advancement of Materials Engineering, in which he holds the honorary level of Fellow of the Society ... developed for special applications There are steels intended for high-temperature and low-temperature service, for springs, for pressure vessels, for boilers, for use in concrete, for railroads, and for ... development of catapults, better swords, and body armor The main reasons for the popularity of steel are the relatively low cost of making, forming, and processing it; the abundance of its two raw materials...
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Handbook of Materials for Product Design Part 2 pptx
... satisfactory for the great majority of applications We now find more often that the performance demanded of weld joints calls for a more detailed study of the weld metal to be certain that this portion of ... processes in a number of different forms One of the earliest forms of filler metal was a shearing taken from the edge of thin base metal Although shearings still are occasionally used for some operations, ... letter E stands for electrode, R for welding rod, and B for brazing filler metal Combinations of ER and RB indicate suitability for either of the process categories designated Therefore, some filler...
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Handbook of Materials for Product Design Part 3 potx
... determine the capacity of fabrication equipment (for example, the force required to shear a piece) or the strength of parts designed to fail at a given force to preclude failure of an entire structure ... values are given for information only; not required for acceptance F indicates “as cast” condition; refer to AA-CS-M11 for recommended times and temperatures of heat treatment for other tempers ... alloys and tempers, from a minimum of ksi (55 MPa) for 1060-O and 1350-O to a maximum of 84 ksi (580 MPa) for 7178-T62 For some tempers (usually the annealed temper) of certain alloys, strengths are...
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Handbook of Materials for Product Design Part 4 doc
... type and gloss of paint, nature of forming operation, type of forming equipment, and design and condition of tools Minimum radius for a specific material, or hardest alloy and temper for a specific ... categories: M for mechanical finishes, C for chemical finishes, and for coatings: A for anodic, R for resinous and other organic coatings, V for vitreous (porcelain and ceramic), E for electroplated ... percentage of the total The forming of titanium alloys is significantly more complex than for steel or aluminum, which maintains the cost premium The conventional routes of forming involve one or more of...
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Handbook of Materials for Product Design Part 6 pdf
... workhorse of the thermoset industry A bit of research should reveal if there is a material of choice for any given product application First, a bit of a review of the basic categories of plastics materials ... because of special properties they offer that are required for that product or process For example, the vast majority of rotomolded parts are made of polyethylene, while glass-fiber-reinforced ... the behavior of materials on impact for many product applications such as appliance housings and the like Unfortunately, this test is usually performed only for extrusion grades of resins that...
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Handbook of Materials for Product Design Part 7 ppt
... situation Curing Each technique for compaction and cure is unique in terms of types of structures for which it can be used, and also in terms of the forms of starting materials For instance, a unidirectional ... of the material and the form of material The forms of material can be described as dry fiber (with wet resin), prepreg, and fiber preform (prepreg or dry) Often, the form -of- material choice is also ... number of methods are in common use for the analysis of composite laminates The use of micromechanics, i.e., the application of the properties of the constituents to arrive at the properties of the...
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Handbook of Materials for Product Design Part 8 ppsx
... subsequent deformations Also, for moderate deformations (10–50%), rubber undergoes what engineers refer to as strain softening; this means that, as the rubber is forced to deform, it takes less force ... complex mixture of several ingredients, the components of which may diffuse into different phases of a polymer blend before reacting Literally hundreds of materials are available for curing rubbers ... parameters for Hytrel, and for a number of other materials in this chapter, can be found on the producers’ Internet home pages * Hytrel is a registered trademark of DuPont for its brand of thermoplastic...
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Handbook of Materials for Product Design Part 9 pdf
... percentage of material one in decimal form k1 = thermal conductivity of material one P2 = volume percentage of material two in decimal form k2 = thermal conductivity of material two In pure form, ... coefficient of thermal endurance for selected materials is shown in Table 7.9 The phenomenally high coefficient of thermal endurance for BN is primarily a result of the high tensile strength to modulus of ... resistivity of a material is a measure of the ability of that material to transport charge under the influence of an applied electric field More often, this ability is presented in the form of the electrical...
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Handbook of Materials for Product Design Part 10 docx
... the initial cooling of the melt Such types of processing can result in very uniform dispersions of particles within the glass with consequent uniform coloration The color often appears very rapidly ... important for glass formation, workability, and control of nucleation, and the composition of the residual glassy phase after processing is important for chemical durability Because of the requirements ... the internal microstructure of a glass-ceramic often resembles a “house of cards” structure Fracture toughness for these materials is generally much greater than for homogeneous glass, as illustrated...
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Handbook of Materials for Product Design Part 11 pps
... machined slot to form the root of the draw This block is called the debiteuse The molten glass that forms the root of the draw is forced up through the slot by the buoyant force of gravity The ... in Fig 8.12 Press forming of the parison before blowing to final shape is used for wide-mouthed containers such as food jars Press forming will be described in the next section For container manufacture, ... mathematical design of the tapering cross-sectional profile of the trough which, in combination with the incline of the top of the trough, assures that the volume flow of glass over the pipe is uniform along...
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Handbook of Materials for Product Design Part 12 ppt
... tables of performance properties of generic resins must be used only as guides, because coatings of one generic type, such as acrylic, epoxy, or polyurethane, are often modified using one or more of ... performing resin to a less expensive, poorer performing resin and call the product by the name of the former An unsuspecting person, whose choice of such a coating is based on properties of the ... chemical, and physical resistance and generally determine the performance characteristics of finish systems Performance properties for coatings, formulated with the most commonly used resins, are shown...
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Handbook of Materials for Product Design Part 13 ppt
... because of the formation of visible cracks observed when the thickness of the deposit exceeds 0.5 µm.107 The crack patterns often overlap with vestiges of plated-over cracks, and the porosity of the ... elongations of 15 to 20 percent for circuit board bath formulations at 80 g/L copper pentahydrate with strength of 40,000 psi I The fine-grained and low-stress deposits are good for electroforming ... protection of steel ranks second behind zinc for industrial environmental protection and is superior for marine exposure Cadmium challenges zinc for corrosion protection of steel and offers the...
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Handbook of Materials for Product Design Part 14 pptx
... are not present to attempt these forms of fastening Another common reason for foregoing bonding or welding is when repeated disassembly of the product is required Fortunately, when these situations ... shaft are made of the same materials and for when they are a metal shaft and a plastic hub) Safety factors of 1.5 to 2.0 are used in most applications For a press-fit joint, the effect of thermal ... This beneficial effect may be due to: Mechanical interlocking Formation of a clean surface Formation of a more reactive surface Formation of a larger surface area Adsorption theory The adsorption...
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Handbook of Materials for Product Design Part 15 pdf
... 12.18 12.4 12.4.1 Surface Preparation for E astomers Types of Adhesives Adhesive Composition Modern-day adhesives are often fairly complex formulations of components that perform specialty functions ... bonding temperature, degree of substrate preparation required, and physical form of the adhesive Table 12.32 lists available forms and processing requirements for various types of adhesives 12.5.1.3 ... 12.18 12.61 Surface Preparation for E astomers (Continued) TABLE 12.19 Surface Preparations for Materials Other than Metals, Plastics, and Elastomers the primary component of an adhesive The binder...
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Handbook of Materials for Product Design Part 16 pps
... Test Method for Determination of Coefficient of Linear Thermal Expansion of Plastics D3386 Test Method for Determination of Coefficient of Linear Thermal Expansion of Electrical Insulating Materials ... Testing of Materials 13.31 D0790 Test Method for Flexural Properties of Plastics D0882 Test Method for Tensile Properties of Thin Plastics D0952 Test Method for Bond or Cohesive Strength of Sheet ... Materials D0953 Test Method for Bearing Strength of Plastics D1043 Test Method for Stiffness Properties of Plastics as a Function of Temperature by Means of a Torsion Test D5420 Test Method for...
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Handbook of Materials for Product Design Part 17 pot
... creation of a large number of new recycling programs, many of them providing curbside collection, many of these programs included PET soft drink bottles and HDPE milk bottles in the mix of materials ... different types of contamination are issues for the use of recycled paper The presence of inks, dyes, or pigments changes the appearance of recycled paper, generally in undesirable ways Mixing of fibers ... including the U.S., recovery of energy is not classified as recycling Recycling rates are significantly higher for some plastic materials than for others, and for some types of plastic products, as...
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Handbook of Materials for Product Design Part 18 ppsx
... molding potting pressure forming pultrusion rotational casting rotational molding slush molding spray-up thermoforming thermoset injection molding transfer molding vacuum forming vacuum-bag molding ... surface preparation testing thermosetting acrylics tin and tin alloy transfer efficiency urethane-modified acrylics vitreous wire enamels Coefficient of thermal endurance Coefficient of thermal ... resistance electrodeposition electroforming electroless flame-spray fluoborates high-temperature diffusion mechanical bonding mechanical keying metallization of ceramics metal-sprayed napped anode...
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Preparation of nanomaterials for catalytic applications
... PREPARATION OF NANOMATERIALS FOR CATALYTIC APPLICATIONS CHONG YUAN YI (B Sc (HONS), NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY NATIONAL ... Experimental Section 126 5.2.1 Materials 126 5.2.2 Preparation of [Ru2(MPA)4(CO)4]n Oligomer 126 5.2.3 Preparation of [Ru2(MPA)4(CO)4]n-capped Ag Nanoparticles 127 5.2.4 Preparation of [Ru2(MPA)4(CO)4]n-capped ... decomposition of Re2(CO)10 in the presence of PPh3 The formation of the graphite shells is driven by photo- ix induced catalytic graphitization of the phenyl groups of PPh3 on the surface of Re nanoparticles...
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