4 results about "Thermal protection" patented technology

The invention relates to a method for producing ceramic layers by spraying. A cold gas spraying method is used to produce polymer ceramics from pre-ceramic polymers. According to said method, a cold gas stream, to which particles of the pre-ceramic polymers are added via a conduit, is generated by a spray gun. The energy for creating a layer on a substrate is produced by injecting a powerful kinetic energy into the cold gas stream, thus preventing or significantly restricting the thermal heating of the cold gas stream. This permits the heat-sensitive pre-ceramic polymers to be spray-applied as a coating on a substrate using a cold gas spraying method. Polymer ceramics can thus be used in an economic method for the rapid production of layers with a relatively large thickness. The invention allows for example armoured layers, thermal protection layers and other functional layers to be produced.

The invention provides a full-frequency wave-absorbing high-temperature heat-insulating stealth integrated paint. The paint comprises: high temperature-resistant reinforced chopped fiber, pressure-resistant hollow microspheres, a wave-absorbing agent, resin and a solvent. According to the full-frequency wave-absorbing high-temperature heat-insulating stealth integrated paint, carbon nanotubes anda magnetic absorbent are effectively compounded and combined, so that the reflection and absorption performance of a coating can be improved. The paint coating has high-temperature resistance, heat insulation and full-frequency wave absorption, can be used on the outer surfaces of weaponry and aircrafts, achieves effective thermal protection on the weaponry and the aircrafts, and also has a full-frequency band stealth effect at the same time. The paint can be applied to various types of airplanes, missiles and the like which have requirements for high-temperature resistance, heat insulation and invisibility, and has important significance for improving the autonomous ability of national defense and military industry production in China and enhancing the comprehensive strength of China.

The invention discloses a preparation method of a phenolic resin impregnation glass fiber composite material. The preparation method comprises following steps: heat treatment, acid etching, and coupling agent treatment are adopted for surface treatment of glass fiber; the treated glass fiber is immersed in a boron modified phenolic resin alcoholic solution obtained via modification with zirconium boride of a certain concentration, vacuum impregnation is carried out, an obtained product is delivered into a muffle furnace for curing molding, an obtained primary product is delivered into a phenolic resin alcoholic solution of a certain mass concentration for repeat impregnation curing so as to obtain a finished product. Optimization of the preparation method is carried out a series of property characterization, and the phenolic resin impregnation glass fiber composite material with desirable density is obtained finally. The advantages of the phenolic resin impregnation glass fiber composite material are that: the density is as low as 0.25 to 0.4g/cm3, excellent oxidation resistance is achieved, the preparation method is simple; and the phenolic resin impregnation glass fiber composite material can be used in the field of high temperature thermal protection.

The invention discloses a transmission and clamping structure capable of realizing self-rotation of a workpiece in a vacuum furnace. The structure comprises a driving gear motor, a shaft seal device, a driving gear I, a driven gear I, a driving gear II, a driven gear II, a workpiece clamping device, a coupler, a transmission shaft, all component supporting structures and the like, wherein the transmission shaft is fixed on a hearth upper cover by means of a transmission shaft supporting structure, the driving gear II and the driven gear I are of an integrated structure and are installed on the hearth upper cover by means of a driving gear II supporting structure, the workpiece clamping device and the driven gear II are fixed on the hearth upper cover by means of the driven gear II supporting structure, and the workpiece is clamped and hoisted at the lower part of the workpiece clamping device. On the premise that bidirectional sealing and thermal protection are guaranteed, the workpiece can be driven by the gear motor by means of a gear transmission system to automatically and stably rotate, and loading and unloading are facilitated; and by means of the structure, all parts of the workpiece can be evenly heated and cooled, heat treatment distortion is reduced, and the consistency of the heat treatment performance of the workpiece is improved.