| Abstrakt: |
The reaction of ZrB2 with Fe and Kh18N10T alloy in the temperature range of 1200–1700°C is studied. It is established that no reactions with formation of new phases occurs in the ZrB2–Fe system up to a temperature of 1400°C. In the ZrB2–Kh18N10T system, the process of diffusion of chromium and iron of the stainless steel into ZrB2 with formation of a compacted layer of ZrB2–(Fe,Cr)2B composite on the contact surface is activated starting from 1200°C. During contact melting in the ZrB2–Fe system, the crystallized alloy is an iron-reinforced ZrB2 composite doped with zirconium and boron. In the ZrB2–Kh18N10T system, iron doped with zirconium, nickel, chromium, titanium, and boron and reinforced with ZrB2 is identified in the structure. Therefore, iron and low-alloy steels can operate in contact with ZrB2 in a neutral or reducing medium up to temperatures not exceeding 1200°C, and iron alloys of the class of heat-resistant and stainless steels can operate in contact with ZrB2 up to 1000°C, regardless of the medium. [ABSTRACT FROM AUTHOR] |
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