127 results about "Indentation hardness" patented technology

The present invention relates to a photochromic film comprising a photochromic dye and a resin component. The photochromic film has a nanoindentation hardness of equal to or greater than 800 nm on at least one of surfaces, surface A, thereof. The present invention further relates to a method of manufacturing a photochromic lens. The method of manufacturing a photochromic lens of the present invention comprises forming a photochromic film having a nanoindentation hardness ranging from 500 to 5000 nm on an outermost surface thereof as well as having a smaller nanoindentation hardness on a surface facing a first mold than that on the outermost surface by coating a photochromic liquid comprising a photochromic dye and a curable component on one surface of the first mold for formation of one of surfaces of a lens and subjecting the photochromic liquid to curing treatment, and a photochromic lens comprising a photochromic film on a lens substrate is obtained by means of the above first mold.

The invention discloses a method for forecasting the uniaxial constitutive relation of material according to press hardness, comprising the following steps: in a press hardness detecting system consisting of a press head loading unit, a deformation detecting unit and a data processing unit, the press head loading unit presses material to be detected by press heads with different appearances, and the deformation detecting unit detects the corresponding deformation of the material to be detected and inputs into the data processing unit to obtain the constitutive parameters E, sigma y and n of forecasting material, so that the portable measurement of the uniaxial constitutive relation of the material and the serviced structural part can be realized by the simple method for forecasting the uniaxial constitutive relation of the material according to the press hardness.

A transparent double-sided self-adhesive sheet is provided which, when bonding to an adhered, not only excels in the ability to conform to steps or surface irregularities caused by a printing site, but also excels in workability such as cutting processability. A transparent double-sided self-adhesive sheet is proposed, having an intermediate resin layer (A) and pressure-sensitive adhesive layers (B) as front and reverse side layers, each of the layers being a layer having one or more species of (meth)acrylic acid ester series (co)polymer as the base resin, in which transparent double-sided self-adhesive sheet, the shear storage elastic modulus (G′(A)) at a frequency of 1 Hz of the intermediate resin layer (A) is higher than the pressure-sensitive adhesive layers (B) in a temperature range of 0° C. to 100° C., and, the indentation hardness (ASKER C2 hardness) of the entire sheet is 10 to 80.

A gas-barrier laminate with a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a coating layer formed by applying a coating material on a surface of the inorganic thin film, wherein said coating layer contains a polyester-based resin having a molecular weight of 3000 to 15000 and a polyurethane-based resin having a molecular weight of 8000 to 30000 at a weight ratio of 5/95 to 95/5, and said gas-barrier laminate has an oxygen permeability of not more than 25 fmol/m²/s/Pa; and a gas-barrier laminate comprising a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a coating layer formed by applying a coating material on a surface of the inorganic thin film, wherein the gas-barrier laminate exhibits an oxygen permeability of not more than 50 fmol/m²/s/Pa as measured with respect to a gas-barrier film obtained by laminating an unstretched polypropylene film having a thickness of 60 μm on the coating layer of the gas-barrier laminate after subjecting the gas-barrier film to hydrothermal treatment at 120° C. for 30 min, and the coating layer has either a hardness of 0.1 to 0.5 GPa as measured at 23° C. in atmospheric air by a nano-indentation hardness testing method, a hardness of 0.03 to 0.5 GPa as measured at 23° C. in water by a nano-indentation hardness testing method, or a ratio of number of carbon atoms derived from carboxyl groups to number of carbon atoms constituting the surface of the coating layer of 0.005 to 0.1.

An indentation hardness test system is provided that includes: a frame including an attached indenter; a movable stage for receiving a part attached to the frame; a camera; a display; a processor; and a memory subsystem. The processor performs the steps of: (a) capturing images of different portions of the part; (b) for each image, computing an average intensity; (c) computing an average intensity across all images; (d) for each pixel, computing PixelAverageDelta_n(x,y) as a function of the raw pixel data and the average pixel intensity of the image frame; (e) for each pixel, computing a correction factor using the average intensity across all images and PixelAverageDelta_n(x,y); (f) performing shading correction by adjusting the raw pixel values by corresponding correction factors; and (g) generating a composite image of the part. Steps (b)-(e) may be performed on moving images while not including stationary images in the computations of those steps.

An indentation hardness test system includes a frame including an attached indenter, a movable stage for receiving a part attached to the frame, a camera, a display, a processor and a memory subsystem. The camera captures images of the part, which can then be provided on the display. The processor is coupled to the movable stage, the camera and the display, as well as the memory subsystem. The memory subsystem stores executable code that instructs the processor to capture a series of real-time images of the part using the camera, obtain associated stage coordinates for each of the images and display a composite image, which includes the series of real-time images assembled according to the associated stage coordinates, of the part.

A developer carrier is capable of stably charging a toner over a long term without change in physical surface shape and composition. The developer carrier has at least a substrate and resin coating layer formed on a surface of the substrate. The resin coating layer includes at least graphitized particles (i) with a degree of graphitization p(002) of 0.20 to 0.95 and an indentation hardness HUT [68] of 15 to 60 or graphitized particles (ii) with a degree of graphitization p(002) of 0.20 to 0.95 and an average circularity SF-1 of 0.64 or more.

The invention belongs to the technical field of composite material preparation and provides polytetrafluoroethylene composite friction material and a preparation method thereof. The polytetrafluoroethylene composite friction material is compounded by polytetrafluoroethylene (PTFE), poly-p-oxybenzoyl (POB) and hexagonal boron nitride (HBN) respectively at mass ratio of 60%-75%, 20% and 5%-20%. The production process of the composite friction material is simple and is convenient to control and the preparation cost of the composite friction material is low; the mechanical property and the bearing capacity of the polytetrafluoroethylene composite friction material are effectively improved; the friction coefficient of the polytetrafluoroethylene composite friction material is low; and the compression strength, the ball indentation hardness and the wear resistance of the composite material are improved. The polytetrafluoroethylene composite friction material can be applied to engineering and transportation fields which require high bearing capacity and have oil-free lubrication, and has high popularization and application values.

This copper-alloy wire rod and a manufacturing method therefor make it possible to inexpensively provide a copper-alloy wire rod that exhibits excellent elongation and flex-fatigue-resistance properties and can be used, for example, as a magnet wire. Said copper-alloy wire rod contains, by mass, 0.5% to 4% silver and 0.05% to 0.3% of each of at least one element selected from the group consisting of tin, manganese, zinc, indium, nickel, cobalt, zirconium, and chromium, with the remainder comprising copper and unavoidable impurities. This copper-alloy wire rod has a diameter or thickness of at most 0.1 mm and exhibits a nano-indentation hardness of at least 1.45 GPa in a region extending from the outer surface of the wire rod to a depth of at least 5% of the diameter or thickness of the wire rod, a nano-indentation hardness of less than 1.45 GPa in a central section, a tensile strength of at least 350 MPa, and an elongation of at least 7%.

The present invention relates to an electrophotographic photosensitive member and an image forming apparatus provided with the same. The electrophotographic photosensitive member includes a substantially cylindrical body and a photosensitive layer having a latent image forming area formed on the body. In the photosensitive layer incorporated in the image forming apparatus, a first end in the axial direction of the latent image forming area is pressed harder than a second end at opposite side of located opposite to the first end in the axial direction. In the photosensitive layer, thickness or dynamic indentation hardness at the first end at one side of the latent image forming area is larger than thickness or dynamic indentation hardness at the second end at opposite side of located opposite to the first end in the axial direction of the latent image forming area.

The invention discloses an atmospheric-pressure and low-temperature sintering method of beta-silicon nitride ceramic, comprising the following steps of: using beta-silicon nitride as a raw material, adding a sintering aid to prepare a mixed powder, and carrying out liquid phase sintering on the mixed powder at normal pressure and in nitrogen atmosphere. The sintering aid is made from the following components of: by weight, 25-35% of MgO, 10-20% of CeO2, 5-10% of AlPO4, 1-20% of Y2O3 and 25-35% of Li2CO3. The high-output beta-silicon nitride powder which is cheap and easily available is adopted in the invention; in comparison with an expensive high-purity alpha-silicon nitride powder, the beta-silicon nitride powder is used to greatly reduce the cost. By the liquid phase sintering at normal pressure and in nitrogen atmosphere with the sintering temperature being within 1600 DEG C, the method provided by the invention has low requirement of equipment so as to reduce the equipment cost. According to the silicon nitride ceramic obtained by the method, the relative density is larger than or equal to 98%, the bending strength ranges from 600Mpa to 700Mpa, and the indentation hardness reaches 7-8Gpa.

The invention which relates to a PTFE friction material with high bearing and a low friction coefficient and a manufacturing process thereof belongs to the field of materials with high bearing and low friction coefficients and manufacturing processes thereof. The PTFE friction material which mainly comprises components of PTFE, poly-p-hydroxybenzoate, expanded graphite, a basalt fiber, a silane or titanate coupling agent and the like is manufactured by adopting a mixing technology of ultrasonic vibration-swirling and the manufacturing process of vacuum cold press sintering or vacuum hot pressing molding. The mechanical strength of the PTFE composite material is obviously increased, the friction coefficient of the PTFE composite material is reduced, and the PTFE composite material which has obvious progresses in aspects of tensile strength, ball indentation hardness, wear resistance and the like allows application demands of harsh industrial fields and transport fields of railway freight car bogies, slide slewing bearings and the like to be satisfied. The PTFE friction material of the invention has the advantages of low friction coefficient, and good bearing performance and corrosion resistance, and the manufacturing process of the PTFE friction material has the advantages of simplicity, low cost, and wide practicality.

The present invention provides an adhesive tape capable of suppressing rise of adhesive force even in the case of being heated due to laser cutting and the like, enabling processing such as taking out of small sheets of semiconductor components and transferring to the other adhesive tape to be easy, and capable of suppressing adhesive residue to an adherend. The adhesive tape of the present invention has an adhesive layer on at least one surface of a substrate, and indentation hardness of a surface of the adhesive layer obtained by using a nanoindentor at the temperature below 100 DEG C is more than 20.0 MPa.

The invention relates to a method for real-time measurement of the oxidation rate of a material by using a nanoindentation shape and belongs to the technical field of engineering materials, structural deformation and mechanical experiments. The method provided by the invention is technically characterized in that the indentation shape of a surface marker of the material is scanned in real time by virtue of an imaging function of a scanning probe microscope of a nanoindentor so as to measure the room temperature of the material and the oxidation rate of the material under a high-temperature condition; the method comprises the following steps: firstly, carrying out indentation experiment on the surface of the material; using residual indentation as a mark indentation; after the material is started to be oxidized, carrying out real-time online scanning and recording on the shape of the mark indentation by virtue of the imaging function of the scanning probe microscope of the nanoindentor; analyzing the shape of the mark indentation; extracting data use for calculation; calculating by virtue of a formula so as to measure the oxidation rate of the material. The method is obtained based on a specific experimental analysis result, thereby providing a novel method for researching oxidation behaviors of materials at different temperatures at micro-nano scale.

The invention discloses a method for quantitative detection of indentation fracture toughness of a coating material. The method includes steps: 1) adopting a pressing head for applying pressure intensity P to the coating surface to form indentation and cracks; 2) determining a coating surface indentation modulus E, indentation hardness H and crack characteristic length c; 3) substituting the indentation modulus E, indentation hardness H, crack characteristic length c and the pressure intensity P into a formula as shown in the specification to obtain material indentation fracture toughness Kc.A method for quantitative assessment of indentation fracture toughness of the coating material can be created according to indentation cracking characteristics to provide basic data support for coating mechanical property design and environmental adaptability assessment.

The invention relates to a nano indentation apparatus based on scanning electron microscope, belonging to the low nano material stress state combination property test field. The invention is characterized in that the nano indentation apparatus comprises a pedestal and a sample substrate and an indentation head supporting seat, a set of angle regulating device, a set of triaxial translation rough adjustment device and a set of triaxial micropositioner are additionally arranged on the sample substrate, so as to move a sample to 2-00Mum away from the indentation head point and cause the sample to be over against the indentation head, the micropositioner of the indentation head is utilized to realize indentation operation, point indentation depth and stress measurement is realized by a strain gage in the interior of the indentation head and a piezoresistor as well as a stress-strain tester, relation of the stress and texturing mechanism is revealed by combining an emphasis-scanning high-resolution imaging system, and the nano indentation apparatus can be used for research of optic and electric properties of material under the action of stress. The invention has simple structure, low price and reliable performance and can realize indentation operation of material and research of mechanic al properties.

The present invention provides a substrate for a power module, a preparing method thereof, a substrate for the power module with a heat radiator, and the power module thereof. In thermal circulation load, the power module can restrain fluctuation or corrugation on a surface of a circuit layer. Furthermore, application of a thermal stress on a joint interface between a ceramic substrate and the circuit layer can be restrained. Additionally, the substrate for the power module has excellent thermal circulation reliability. The substrate (10) for the power module is provided with an aluminum circuit layer (12) on one surface of the ceramic substrate (11), wherein, the circuit layer (12) is provided with a body layer (12B) and a hardened surface layer (12A) which is configured exposed at the surface side. The indentation hardness (Hs) of the surface of the circuit layer (12) is set in a range between 50mgf/mu m2 and 200mgf/mu m2. More than 80% of the area of the indentation hardness (Hs) becomes the hardened surface layer (12A). The indentation hardness (Hb) of the body layer (12B) is less than 80% of the indentation hardness (Hs).

Disclosed is a magnetic recording medium which has a high S/N ratio of an output read from a servo signal, few deposits adhered to a head, and a low error ratio. The magnetic recording medium has a magnetic layer which includes a servo band onto which a servo signal for controlling tracking of a magnetic head is written and a data band onto which data are recorded. The servo signal is written onto the servo band which has been magnetized in one direction along length of the magnetic recording medium, by magnetizing the servo band in a direction opposite to the one direction. Further, the magnetic layer has indentation hardness of 60 to 140 Kg/mm<2>.

Various embodiments of a hearing assistance device and a method of forming such device are disclosed. The device includes a housing having a shell and a frame disposed at least partially within the shell. An inner surface of the shell and at least a portion of the frame define a void. Further, an indentation hardness value of the frame is greater than an indentation hardness value of the shell. The hearing assistance device also includes hearing assistance components that are disposed at least partially within the void.