Role of Silica in the Oxidation Resistance of Molybdenum Disilicide

Nature ◽  
1964 ◽  
Vol 203 (4948) ◽  
pp. 967-969 ◽  
Author(s):  
GEORGE TODD ◽  
ERIC PARRY
Keyword(s):  
Oxidation Resistance ◽  
Molybdenum Disilicide

Phase transformation and layer evolution in molybdenum disilicide-silicon carbide nanolayered coatings

1994 ◽  
Vol 52 ◽  
pp. 538-539
Author(s):  
H. Kung ◽  
T. R. Jervis ◽  
J.-P. Hirvonen ◽  
M. Nastasi ◽  
T. E. Mitchell ◽  
...  
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Matrix Material ◽  
Molybdenum Disilicide ◽  
High Temperature Strength ◽  
Cross Sectional ◽  
Good Oxidation Resistance ◽  
Structural Applications

MoSi2 is a potential matrix material for high temperature structural composites due to its high melting temperature and good oxidation resistance at elevated temperatures. The two major drawbacksfor structural applications are inadequate high temperature strength and poor low temperature ductility. The search for appropriate composite additions has been the focus of extensive investigations in recent years. The addition of SiC in a nanolayered configuration was shown to exhibit superior oxidation resistance and significant hardness increase through annealing at 500°C. One potential application of MoSi2- SiC multilayers is for high temperature coatings, where structural stability ofthe layering is of major concern. In this study, we have systematically investigated both the evolution of phases and the stability of layers by varying the heat treating conditions.Alternating layers of MoSi2 and SiC were synthesized by DC-magnetron and rf-diode sputtering respectively. Cross-sectional transmission electron microscopy (XTEM) was used to examine three distinct reactions in the specimens when exposed to different annealing conditions: crystallization and phase transformation of MoSi2, crystallization of SiC, and spheroidization of the layer structures.

Molybdenum disilicide coating on steel and its oxidation resistance

1982 ◽  
Vol 1 (1) ◽  
pp. 19-22 ◽  
Author(s):  
Seiji Motojima ◽  
Akiyoshi Fujimoto ◽  
Kohzo Sugiyama
Keyword(s):  
Oxidation Resistance ◽  
Molybdenum Disilicide ◽  
Molybdenum Disilicide Coating

Role of Al2O3 layer in oxidation resistance of Cu–Al dilute alloys pre-annealed in H2 atmospheres

2006 ◽  
Vol 48 (11) ◽  
pp. 3692-3702 ◽  
Author(s):  
Sang-Hwui Hong ◽  
Yongfu Zhu ◽  
Kouji Mimura ◽  
Minoru Isshiki
Keyword(s):  
Oxidation Resistance ◽  
Al2o3 Layer ◽  
Dilute Alloys

The role of microscopy in the alloy design of Ni- and Fe-based aluminides

1992 ◽  
Vol 50 (1) ◽  
pp. 168-169
Author(s):  
J.A. Horton
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Oxidation Resistance ◽  
Industrial Applications ◽  
Al Alloys ◽  
Ordered Alloys ◽  
Successful Control ◽  
Oxidation Resistant

During the last 10 years, there has been a resurgence of interest in ordered alloys for structural uses due to the discovery of the dramatic ductilizing effect of boron on grain boundaries in Ni3Al. With this discovery, it was hoped that the property of an increase in strength as the temperature is increased could be utilized as well as the excellent oxidation resistance. Now, alloys based on Ni3Al are in use in specialized industrial applications, such as high temperature forging dies and being tested for use as turbocharger rotors. Due to the successful control of the grain boundary strength in Ni3Al, other systems were reexamined. For example, Fe3Al was also thought to have inherently brittle grain boundaries, however it was found that with purer alloys the material failed by cleavage. Subsequently, development of practical, inexpensive, oxidation resistant alloys has proceeded. Fe3Al alloys are currently being tested for automobile exhaust applications.

Sign in / Sign up

Export Citation Format

Share Document