12 results about "Defense industry" patented technology

The invention relates to a composite liquid armor based on pure silica nanoparticles derived from sea sand and its production method. In our invention, composite liquid armor can be utilized in both military and civilian defense industries. Alongside its durability, the armor offers high performance, enables ease of movement, and features a lightweight, free-particle modular structure. By providing a domestic alternative, it reduces dependency on foreign technologies in this field.

The application discloses an ultrahigh dielectric constant transmitting piezoelectric ceramic material and a preparation method thereof, and belongs to the technical field of piezoelectric ceramic manufacturing. 1‑m‑n Sr m Ca n [(Mn 1 / 3 W 2 / 3 ) x (Co 1 / 3 Nb 2 / 3 ) y (Zr z Ti 1‑z ) 1‑x‑y ]O3+awt%Fe2O3+bwt%CeO2, wherein 0.06<=m<=0.10, 0<=n<=0.05, 0.03<=x<=0.10, 0.05<=y<=0.09, 0.47<=z<=0.53, 0<=a<=0.09, and 0<=b<=0.05. The prepared piezoelectric ceramic material not only has an ultrahigh dielectric constant (epsilon r3 T >=2600), but also has a high coupling coefficient (kp>=0.56), a low dielectric loss (tgdelta<=0.4%), a moderate mechanical quality factor (Q m >=400), and the like. The piezoelectric ceramic material is a transmitting piezoelectric ceramic material with excellent comprehensive performance, can meet diversified performance requirements of piezoelectric ceramic materials of a water sound emission transducer, and has a wide application prospect in the fields of water sound and national defense industry.

The invention discloses a binder for BJ forming refractory metal and a preparation method and application thereof, and belongs to the technical field of binder forming, the binder comprises the following raw materials by weight: 100-150 parts of a water-based ethylene-acrylic acid copolymer solution, 80-100 parts of a NaOH solution, 150-200 parts of ethanol, 20-40 parts of dioctyl phthalate, 10-30 parts of yttrium oxide powder, and 100-130 parts of diluted hydrochloric acid. And 200 to 300 parts of water. The binder for the BJ forming refractory metal is high in viscosity, high in bonding strength and capable of being degreased at the high temperature, has good compatibility, excellent adhesion capacity and stability on various refractory metals, has the advantages of being low in residue, easy to remove and the like, is high in degreasing and sintering compactness and excellent in mechanical property, and is suitable for large-scale production. The method is suitable for producing complex and high-performance refractory metal structural parts, and has important application in the fields of aerospace, national defense industry, nuclear industry, medical treatment and the like.

The invention relates to a method for providing superhydrophobic properties to metal substrates suitable for use in obtaining elements that provide cooling in electronic systems, elements within supercomputers, medical instruments, space environment control devices, various tools and devices in the defense industry, drying systems in the food industry, household appliances or devices, self-cleaning products, but not limited thereto, and a metal product obtained by this method having at least one surface provided with superhydrophobic properties.

The invention relates to a planarity system used in the production, defense industry, simulation systems, maritime, mining and construction industries.

The invention discloses a high-toughness high-density low-activation refractory multi-component alloy and a preparation method and application thereof. The alloy is composed of three low-activation refractory elements W, Cr and Zr and O introduced through a contact environment in the preparation process. The alloy material is prepared from the following components in percentage by atom: 75.0 to 91.5 percent of W, 7.0 to 16.5 percent of Cr, 1.0 to 5.5 percent of Zr and 0.5 to 3.0 percent of O, wherein the ratio of the atomic fraction of Cr to the atomic fraction of Zr is 1.5-5.5, and the ratio of the atomic fraction of Zr to the atomic fraction of O is 0.5-2. According to the multi-component alloy disclosed by the invention, the room-temperature obdurability is remarkably improved while multiple advantages of pure W are reserved, and the multi-component alloy has the excellent characteristics of high density, high toughness, low activation, high temperature resistance and the like, and can be used as a high-performance heavy alloy to be applied to multiple fields such as aerospace, national defense industry, nuclear energy and the like.

The invention discloses a blocky nano twin crystal light metal material and a preparation method thereof, the chemical composition expression of the blocky nano twin crystal light metal material is Mg-xN-yM, x and y are mass fractions, x is more than or equal to 6 and less than or equal to 20, and y is more than 0 and less than or equal to 3; n is one or more of Zn, Li, Al and Sc, and M is one or more of Ti, Cu, Mo, Si, Ni, Ce and Zr; the blocky nano-twin crystal light metal material is obtained through pressure electric arc melting, low-temperature high-energy ball milling and high-temperature high-pressure sintering. The preparation method is simple, the process is easy to control, the twin crystal type of the prepared blocky nano twin crystal light metal material is {10-11} compressed twin crystals, the maximum number of the twin crystals can account for 90% of the total volume of the material, and the blocky nano twin crystal light metal material has the beneficial effects of being low in density, high in specific strength and excellent in comprehensive mechanical property; the method can be used in the fields of aerospace, new energy vehicles, biomedical treatment, national defense and military industry and the like.

It is related to the ballistic ceramic structure used in systems for protection against ballistic munitions and / or armored vehicles in the defense industry, security and military protection sectors, and is characterized in that it contains convex (12) and concave (11) surfaces which increase the ballistically effective volume by interlocking and thus provide effective ballistic protection by preventing the formation of ceramic-free areas by interlocking the plates (10).

This invention discloses a high-strength, high-toughness, low-activation refractory multi-component alloy, its preparation method, and its applications. The alloy is composed of three low-activation refractory elements: W, Cr, and Zr, as well as O introduced through contact with the environment during preparation. By atomic percentage, it consists of 75.0–91.5% W, 7.0–16.5% Cr, 1.0–5.5% Zr, and 0.5–3.0% O; wherein the atomic fraction ratio of Cr to Zr is 1.5–5.5, and the atomic fraction ratio of Zr to O is 0.5–2. This multi-component alloy retains many advantages of pure W while significantly improving room-temperature strength and toughness. It also possesses excellent properties such as high density, high strength and toughness, low activation, and high-temperature resistance, making it suitable as a high-performance heavy alloy for applications in aerospace, defense industry, nuclear energy, and many other fields.

A robotic visual and tactile detection system may perform surface inspection to identify different defects (e.g., different sizes, geometries, smoothness, textures, etc.) on various large industrial components used in various industries (e.g., manufacturing industry, transportation industry, aerospace industry, national defense industry, power industry, processing industry, etc. The system may use an RGBD camera for visual inspection to identify defective areas. A vision and haptic guided robot control system may be configured to control a robot to perform haptic examinations to detect and identify various defects in various surfaces and various attributes of the defects.

The invention provides a preparation method of a continuous fiber reinforced SiC ceramic composite material for 3D printing, and aims to solve the problems of difficulty in forming of a complex structure, high mold cost, long manufacturing period, high material brittleness, low fracture toughness and the like in the prior art. The method comprises the following steps that S1, a continuous fiber printing wire is prepared, thermoplastic resin is dried, continuous fibers are subjected to high-temperature glue removal, coupling agent modification and impregnation operation, and extrusion molding is conducted in combination with ultrasonic-assisted equipment; s2, preparing a silicon carbide wire, mixing silicon carbide powder and a sintering aid through wet ball milling, and performing twin-screw extrusion granulation and single-screw melt extrusion molding; and S3, printing a fiber reinforced / SiC / polymer blank by using an FDM 3D printer, and performing degreasing and high-temperature sintering processes to obtain the final material. The method effectively improves the mechanical property and fracture toughness of the material, can efficiently prepare the ceramic composite material with a complex structure at low cost, and is suitable for the fields of aerospace, national defense industry and the like.

The application discloses a kind of BJ forming refractory metal binder and its preparation method and application, belong to binder forming technical field, the binder includes the following weight parts of raw materials: water-based ethylene-acrylic acid copolymer solution 100-150 parts, NaOH solution 80-100 parts, ethanol 150-200 parts, dioctyl phthalate 20-40 parts, yttria powder 10-30 parts, dilute hydrochloric acid 100-130 parts, water 200-300 parts.The application develops a kind of BJ forming refractory metal binder with high viscosity, high bonding strength, high-temperature debinding, not only has good compatibility to a variety of refractory metals, excellent adhesion and stability, with low residue, easy to remove and other advantages, high densification of debinding sintering, excellent mechanical properties, suitable for producing complex, high-performance refractory metal structural parts, has important application in aerospace, national defense industry, nuclear industry, medical field etc..