67 results about "Cobalt Chromium Alloys" patented technology

A dual mobility femoral head construct has a secure acetabular shell received within an acetabular recess formed in a pelvis. An implantable prosthetic device is implantable after a failure of an originally installed articular head insert of an acetabular cup assembly. A hemispherical liner is formed from a cast cobalt-chromium alloy for thinness and elasticity. At least three spacers are annularly displaced about an outer diameter of the hemispherical liner to define a uniform cement thickness with the secure acetabular shell. Web shaped depressions are formed circumferentially in the outer diameter of the hemispherical liner to receive cement to resist lever out forces and to secure the cement bond with the secure acetabular shell. A replacement articular head insert is then received for dual mobility rotational movement in an inner diameter of the hemispherical liner. A femoral head implant is received for articulating movement in the articular head insert.

The invention discloses an intravascular stent of a composite structure; the intravascular stent comprises a stent main body, wherein the distal end of the stent is restrained as an adducted form by virtue of a tightening wire, and the tightening wire is degradable magnesium alloy or degradable iron alloy; one or more auxiliary wires are woven on the stent main body; when the stent is applied to blood vessel of brain, the auxiliary wire is pure platinum or alloy thereof, pure gold or alloy thereof, pure tungsten or alloy thereof, or pure tantalum or alloy thereof; and when the stent is applied to peripheral blood vessel, the auxiliary wire is cobalt-chromium alloy or stainless steel or tungsten or tantalum. The stent, when serving as a thrombus removal system for treating cerebral apoplexy, not only can be used for removing thrombus effectively for several times but also can be used for catching small thrombus flowing to distal end so as to prevent distal blood vessels from getting blocked; and the stent can be used for dilating stenosis or blocked brain blood vessel or peripheral blood vessel, so as to take an effect of dredging and reconstructing a blood flow. The stent can be repositioned and released, with high controllability; and the stent can be used for reducing operation difficulty and greatly improving an operation success rate.

The present invention includes a radiopaque stent comprising a cylindrical main body. The tubular main body comprises a cobalt chromium alloy that comprises cobalt, chromium and one or more radiopaque materials.

The invention relates to a magnetic-navigation joint type puncture needle which comprises a head section and needle sections, wherein, the head section is made of stainless steel material with high magnetic conductivity and is connected with the following needle sections coaxially mounted with the head section through a flexible joint; two needle sections are also coaxially connected with each other through a flexible joint; the needle sections are made of non-magnetic stainless steel material; the flexible joints adopts serpentine tubes formed by melting and engraving cobalt-chromium alloy through laser; and both the head section and the needle sections can be bent, but the flexibility of the head section and that of the needle sections are smaller than the flexibility of the flexible joints. According to the invention, an extra magnetic field force is used to cause the head section of the needle to deflect, so that the following purposes can be achieved that the insertion direction of the needle can be changed, and the other needle sections also deflect with the deflection of the head section; accurate navigation for and control over puncture path and puncture position when the puncture needle performs a non-direct channel puncture in a human body; the puncture needle provided by the invention can reach niduses which other types of puncture needles can not reach; the application scope of minimally invasive surgery is expanded; iatrogenic injuries can be reduced; and patients can be benefited.

The invention discloses a high-strength and high-toughness CoCrMoW alloy based on laser additive manufacturing and a preparation method of the high-strength and high-toughness CoCrMoW alloy. The preparation method comprises the following steps of (1) gas atomization powder preparing, wherein after CoCr alloy raw materials are molten together into melt, the melt is crushed by high-pressure inert gas into tiny liquid drops, and powder is formed after solidification and cooling; (2) blank additive manufacturing forming, wherein the powder is prepared into a formed blank through the laser additivemanufacturing technology; (3) strengthening and toughening heat treatment, wherein the formed blank is subjected to strengthening and toughening heat treatment to obtain the high-strength and high-toughness CoCrMoW alloy based on laser additive manufacturing, the yield strength of the alloy reaches up to 0.9 GPa or above, the tensile strength of the alloy reaches up to 1.2 GPa or above, and the ductility of the alloy reaches up to 14% or above; and (4) plastifying and toughening heat treatment, wherein the high-strength and high-toughness CoCrMoW biological alloy obtained in the step (3) canbe subjected to subsequent plastifying and toughening heat treatment, the plasticity of the high-strength and high-toughness CoCrMoW biological alloy based on laser additive manufacturing can be further improved, and the plasticity of the high-strength and high-toughness CoCrMoW biological alloy based on laser additive manufacturing can reach 26% or above on the premise of guaranteeing that the tensile strength is 1.1 GPa or above.

The invention discloses an antifriction and toughening metal/ceramic bionic multilayer-film artificial joint, comprising an artificial joint matrix (1). The artificial joint matrix is made of materials such as stainless steel, nickel-titanium shape memory alloy, medical titanium alloy or cobalt-chromium alloy. The artificial joint is characterized in that a bionic multilayer film grows on the surface of the artificial joint matrix (1) and is formed in the way that soft metal film layers (2) and hard ceramic film layers (3) grow alternatively to each other, and the thickness of the bionic multilayer film ranges from 50nm to 30mum. According to the invention, the soft metal film layers (2) and the hard ceramic film layers (3) are sequentially deposited on the surface of the artificial joint matrix (1) by an ultrahigh vacuum magnetron sputtering method, thus forming the bionic multilayer film which is ordered and is controllable in thickness. The bionic multilayer film is small in layer friction factor, good in bioactivity and strong in fluid corrosion resistance, can effectively buffer damage on a coating by instantaneous impact, remarkably improves biocompatibility and tribology performance of the artificial joint, and reduces tissue reactivity and aseptic loosening of the artificial joint.

A prosthetic joint ball is receivable in a prosthetic joint socket to form a prosthetic joint. The ball is generally spherical and is mounted on a stem. The outer rounded surface of the ball is provided with a layer of CVD diamond, prepared by mechanical polishing to present a surface with an RA of 20 nm or less. The ball is formed of a silicon carbide or similar substrate and includes a rounded recess. Mounted in the recess is a metal insert formed of a cobalt-chromium alloy or titanium alloy. The metal insert includes a socket shaped and sized to receive, in use, the tapered end of the stem.

The invention discloses a method for 3D printing of a rapidly renewable cobalt-chromium alloy coated tooth. Laser scanning is adopted to assist manufacturing of an individual false tooth model, by using a 3D printing technique, zirconium dioxide powder is mixed with a small amount of graphene and carbon nanotube powder to make a false tooth main body, cobalt-chromium alloy powder is mixed with a small amount of the graphene and the carbon nanotube powder to make a false tooth base which is small and large gradually, and coating treatment is carried out on the false tooth base. The problems that a pure metal material is not attractive in appearance, a pure ceramic material is too crispy and long in recovery period after implanting can be overcome, people can feel that a false tooth and gingiva grow together, and an individual false tooth which is high in precision, good in wearing resistance, good in acid-alkali resistance, high in mechanical strength and good in biocompatibility can befinally manufactured.

The invention discloses cobalt-coated ceramic composite powder. The cobalt-coated ceramic composite powder is prepared by the following steps: adding ceramic powder into cobalt-containing lyosol, carrying out stirring and foaming in the presence of a long-acting particle foam stabilizer to obtain a suspension in which ceramic foam stably exists, adding a precipitator into the suspension, carryingout gel reaction to obtain coated ceramic particle precursor powder, and reducing the coated ceramic particle precursor powder to obtain the cobalt-coated ceramic composite powder with a core-shell structure. The cobalt-coated ceramic composite powder is added into cobalt-chromium alloy powder, the cobalt-coated ceramic modified cobalt-based composite material for dentistry can be obtained and used for preparing a false tooth metal inner crown through selective laser melting forming, the coefficient of thermal expansion is low, and the cobalt-coated ceramic composite material is resistant to abrasion and good in tensile property.

A working wire for a biological sensor is disclosed. The working wire includes a substrate comprising cobalt-chromium (Co—Cr) alloy or Nitinol alloy, a platinum layer comprising platinum on the substrate, and a membrane layer comprising a biological membrane applied over the platinum layer.

The invention discloses a preparation method of nickel coated ceramic composite powder based on selective laser melting molding. The preparation method comprises the following steps of etching ceramicpowder by an etching liquid composed of formic acid and hydrogen peroxide; then sensitizing and activating the etched ceramic powder by a conventional method; and putting the ceramic powder in a chemical nickel-plating solution to react to obtain uniformly coated nickel coated ceramic composite powder. The nickel coated ceramic composite powder prepared by the invention is uniform in size distribution and high in quality of a nickel plate. A cobalt-chromium alloy is modified by the nickel coated ceramic composite powder. A cobalt-chromium alloy part is prepared by selective laser melting molding. The wear rate of the cobalt-chromium alloy part is lower than that of a common cobalt-chromium alloy, and the hardness and tensile strength of the cobalt-chromium alloy part are superior to thoseof the common cobalt-chromium alloy, so that the cobalt-chromium alloy part is suitable for being used as an orthopaedic implant, in particular artificial hip joint prosthesis.

The invention discloses a production method of cobalt-chromium-alloy-based spherical niobium carbide powder. The production method comprises the steps of 1, drying cobalt-chromium alloy with the grainsize ranging from 45 microns to 150 microns and spherical niobium carbide with the grain size ranging from 45 microns to 150 microns for 2-4 hours at the temperature of 110-130 DEG C, wherein the spherical niobium carbide is prepared through a plasma method, and the content of niobium carbide is greater than 99%; 2, adding, by weight percentage, 50%-80% of the cobalt-chromium alloy and 20%-50% ofthe spherical niobium carbide into a three-dimensional powder mixer, wherein the rotating speed of the three-dimensional powder mixer is 15-20 r/min, and the time is 90-120 min; and 3, collecting thecobalt-chromium-alloy-based spherical niobium carbide powder. According to the production method of the cobalt-chromium-alloy-based spherical niobium carbide powder, operation is easy and convenientto conduct, the production cost is low, and industrialization is easy to achieve; the obtained cobalt-chromium-alloy-based spherical niobium carbide powder is good in flowability and suitable for massproduction; when the cobalt-chromium-alloy-based spherical niobium carbide powder is used as a coating, the problem that cracking is caused due to segregation is not likely to be generated; and the cobalt-chromium-alloy-based spherical niobium carbide powder is resistant to high temperature, corrosion and abrasion and can be applied to a plasma transferred arc surfacing process or a thermal spraying process, and the good commercial value is achieved.