Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Structure and Properties of Alloys Obtained by Aluminothermic Reduction of Deep-Sea Nodules
oleh: Pavel Novák, Nguyen Hong Vu, Lucie Šulcová, Jaromír Kopeček, František Laufek, Alisa Tsepeleva, Petr Dvořák, Alena Michalcová
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2021-01-01 |
Deskripsi
This paper brings an innovative processing route of manganese deep-sea nodules, which results in completely new grades of alloys. Deep-sea nodules were processed by aluminothermic method without the extraction of individual elements, producing complexly alloyed manganese-based “natural alloys”. Three levels of the amount of aluminum were used for the aluminothermic reduction, and hence the alloys differ strongly in the amount of aluminum, which has a significant effect on their phase composition. The alloys have very high wear resistance, comparable with tool steel. The disadvantage of low-aluminum alloy is the susceptibility to local thermal cracking during friction, which occurs especially in the case of a dry sliding wear against the static partner with low thermal conductivity.