3results about How to "Improve high temperature thermal stability" patented technology

The invention provides a TiAlN / MAX-phase multi-layer composite coating as well as a preparation method and application thereof, and relates to the technical field of functional coating materials. The coating adopts a nano alternating multilayer structure of the TiAlN layer and the MAX phase layer, so that the bottleneck that hardness and toughness of a traditional coating are difficult to consider at the same time is solved, and the comprehensive mechanical property and the failure resistance of the coating are remarkably improved; and under the high-temperature working condition, high-activity Al in the MAX phase generates a continuous and compact Al2O3 protective film with a stable structure in situ, so that the dynamic self-repairing and melting loss resisting functions are realized, and the service life of a part is greatly prolonged. The coating has excellent thermal conductivity and stress relaxation capability, and has outstanding thermal shock resistance and high-temperature stability. The preparation method can accurately regulate and control the structure parameters and the interface bonding state of each layer, the process is stable, and industrial production is facilitated. The coating is applied to metal parts such as aluminum / magnesium alloy die-casting dies, and is high in practicability and wide in application prospect.

This invention discloses a three-dimensional continuous reinforced phase reinforced copper matrix composite material and its applications. The composite material comprises a three-dimensional continuous porous framework composed of reinforcing phases and a copper matrix phase filling the pores of the framework. The reinforcing phases are interconnected in three-dimensional space to form a continuous network, and the copper matrix phase is continuously distributed in three-dimensional space and fills the pores of the framework. The two phases are interpenetrating, forming a double-continuous three-dimensional network structure. The composite material exhibits good dimensional stability and mechanical properties, making it particularly suitable for applications requiring high heat flux and frequent thermal cycling, such as nuclear fusion divertors.

This invention provides a heat-resistant, migration-resistant, and moisture-adhesive starch-based material. By weight, the starch-based material comprises the following components: 60-85 parts natural starch, 3-8 parts composite crosslinking agent, 5-12 parts heat-resistant modified filler, 8-15 parts low-migration composite plasticizer, 2-6 parts moisture-adhesive functional regulator, 0.5-2 parts coupling agent, 0.3-1.5 parts antioxidant stabilizer, and 30-60 parts deionized water. This invention also provides a preparation method and application of the starch-based material. Through oxidative crosslinking composite modification, functional additive compounding, and three-dimensional network structure reconstruction technology, this invention constructs a dense and stable crosslinked network, effectively inhibiting the migration and precipitation of small molecule additives, significantly improving the material's high-temperature thermal stability and resistance to moisture-heat aging, while simultaneously endowing the material with durable and controllable moisture adhesion properties. The preparation process of this invention is simple, the raw materials are inexpensive and readily available, and the material is green and biodegradable. The resulting material can be widely used in food packaging, composite adhesives, medical bonding materials, daily-use moisture-adhesive products, and biodegradable coatings.