Bimetallic materials comprising cermets with improved metal dusting corrosion and abrasion/erosion resistance
US12000027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2020 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Nov 9, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2204/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods and compositions are provided for improving metal dusting corrosion, abrasion resistance and/or erosion resistance for various materials, preferably for applications relating to high-temperature reactors, including dense fluidized bed reactor components. In particular, cermets comprising (a) at least one ceramic phase selected from the group consisting of metal carbides, metal nitrides, metal borides, metal oxides, metal carbonitrides, and mixtures of thereof and (b) at least one metal alloy binder phase are provided. Ceramic phase materials include chromium carbide (Cr23C6). Metal alloy binder phase materials include β-NiAl intermetallic alloys and Ni3Sn2 intermetallic alloys, as well as alloys that contain α-Cr and/or γ′-Ni3Al hard phases. Preferably, bimetallic materials are provided when the cermet compositions are applied using a laser, e.g., a laser cladding method such as high power direct diode (HPDD) laser, or by plasma-based methods such as plasma transfer arc (PTA) welding and powder plasma welding (PPW).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.