Continuing our work on understanding the oxidation behavior of multiphase composite alloys based on the Mo-Si-B system, we investigated three alloys in the Mo-Si-B system, designated as A1, A2, and A3. The nominal phase assemblages of these alloys are: A1 = Mo5Si3Bx (T1)-MoSi2-MoB, A2 = T1Mo5SiB2 (T2)-Mo3Si, and A3 = Mo-T2-Mo3Si. Our previous work showed that for exposures to 1100°C, all alloys...

Aluminium alloy composites have been extensively investigated for use in tribo-contact applications, however little detailed literature exists on the sub-surface microstructural evolution as a result of lubricated sliding wear. In this study two un-reinforced alloys (2124 & 5056) and identical alloy composites, reinforced with 15vol.% MoSi2 intermetallic particles were produced by a powder meta...

Like many other intermetallic materials, MoSi2 coatings are typically hard, but prone to catastrophic failure due to their low toughness at ambient temperature. In this paper, a self-assembled hierarchical structure that closely resembles that of nacre (i.e., mother of pearl) was developed in a MoSi2-based coating through a simple, yet cost-effective, depostion technique. The newly formed coati...

The cover illustrates the sintering of MoSi2/Al2O3/Feldspar heating elements fabricated by injection molding, thus allowing more complex geometries and economical element production, see article number 2100517 Dirk Penner co-workers. Different binder systems are investigated various shapes as shown in illustration produced tested. (Cover design: René Wick-Joliat)

To prevent premature triggering of the healing reaction in Mo-Si containing self-healing thermal barrier coating system, an oxygen impenetrable shell (α-Al2O3) around sacrificial particles (MoSi2) is desired. Here encapsulation method presented through selective oxidation Al Mo(AlxSi1-x)2 particles. Healing designed terms alumina thickness, particle size and fraction dissolved. By replacing Si ...

In this study, the oxidation stability up to 1000 °C in air of Hf(C,N)-MoSi2 composites was explored under non-isothermal and isothermal conditions. Composites with 1, 5, 10, 20% volume fractions were produced by low-energy ball milling subsequent spark plasma sintering. Differential scanning calorimetry (DSC) thermogravimetric (TG) coupled mass spectrometry used reveal staging process dependin...