2 results about "Full density" patented technology

Disclosed herein is a method of consolidating by liquid phae sintering a new class of designed-microstructure particulate material with unprecedented combinations of property extremes called Tough-Coated Hard Powders (TCHPs). The method generally comprises providing a plurality of core particles, wherein the core particles comprise a core material of a first compound; providing an intermediate layer on a majority of the core particles, the intermediate layer comprising a second compound, different in composition from the first compound and having a higher relative fracture toughness, the second compound being capable of bonding with the first compound and being capable of bounding with a metal chosen from iron, cobalt, nickel, copper, titanium, aluminium, magnesiu, lithium, beryllium, silver, gold, and platinum and their mixtures, thereby forming coated particles; and applying an outer layer to the coated particles, the outer layer comprising a metal chosen from iron, cobalt, nickel, and their mixtures to form a substantially continuous outer layer on said intermediate layer, thereby forming component particles of the particulate material; shapping a plurality of the component particles into an article; and sintering the articles to substantialy full density without significant external pressure at a temperature sufficient to liquefy and portion of the outer layer, and for a time sufficient to liquefy a portion of the intermediate layer. The disclosed method leads to sintered particulate materials that may be individually coated with nanolayers of a metal compound having a relatively higher fracture toughness, such a WC or TaC. These coated particles may be additinally coated with a second layer comprising a binder metal, such as Co or Ni. This unique material resuls in multiproperty alloys within the TCHP sintered structure, thus allowing for a combination of normally conflicting performance extremes, including, but not limited to toughness, abrasiveness, chemical wear resistance, and light weight, at levels heretofore unseen in the powder metallurgical art.

The application discloses a kind of electrolyte quick preparation method, comprising the following steps: S1, determine the density of high-density acid used at standard temperature;S2, determine the density of low-density acid to be prepared at standard temperature;S3, table look-up determines the corresponding percentage content of sulfuric acid of two densities;S4, the required amount is calculated using the principle of equal amount of pure acid;S5, different density and amount of table preparation.The application establishes the standardization process of "table look-up-computation-table look-up", combines the double protection of mass conservation law and authoritative data table, shortens the electrolyte preparation time by more than 80%, controls the concentration error within ±0.5%, and with the help of gradient proportioning table covering the full density range of 1.20-1.30g / cm3, fundamentally solves the technical problem that precision and efficiency are difficult to balance in the electrolyte preparation process of lead-acid battery industry, and meets the flexibility requirements of laboratory research and development and the batch requirements of industrial production.