Sintered Fe—Al based porous alloy material with high-temperature oxidization resistance and filtering elements
US10159920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2014 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Sep 24, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2301/35
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are a sintered Fe—Al based alloy porous material with high temperature oxidation resistance and a filter element using same. The porous material has a porosity of 30-60% and an average pore diameter of 0.5-50 μm, and has that: a) it mainly consists of three elements of Fe, Al and Cr, and the total weight of these three elements accounts for at least 90% of the weight of the porous material, wherein the weight of Fe is 60-85% of the total weight of Fe and Al, and the weight of Cr is 10-30% of the total weight of Fe, Al and Cr; b) the Cr in the porous material mainly presents in the form of a chromium compound of a Fe—Al based compound, or mainly presents in the form of a chromium compound of the Fe—Al based compound and FeCr, and is almost uniformly dispersed in the porous material; and c) it has a tensile strength≥45 MPa, an air flux≥80 m3/m2·KPa·h for the sintered Fe—Al based alloy porous material with a thickness≤5 mm, a weight loss rate of at most 0.5% after being immersed into a NaOH solution with a mass fraction of 10% at room temperature for 15 days, and a material weight gain rate of at most 0.25% after being kept at 1000° C. in air for 90 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.