TY - JOUR
T1 - Nickel aluminum superalloys created by the self-propagating high-temperature synthesis of nanoparticle reactants
AU - Hunt, Emily M.
AU - Granier, John J.
AU - Plantier, Keith B.
AU - Pantoya, Michelle L.
N1 - Funding Information:
The authors would like to acknowledge the support of the National Science Foundation under Grant No. CTS-0210141 and our program manager, Dr. Farley Fisher. We are also grateful for support for this work provided by the United States Army Research Office under Grant No. DAAD19-02-1-0214 and our program manager, Dr. David Mann. Ms. Hunt gratefully acknowledges partial support provided by the Achievement Rewards for College Scientists (ARCS) foundation of Lubbock, TX.
PY - 2004/10
Y1 - 2004/10
N2 - Advancements in nanotechnology for material processing via combustion synthesis have spurred the development of superalloys that provide improved protective properties. Nanoscale reactant particles offer unique thermal properties and increased homogeneity that improve the microstructural features and macroscopic properties of the synthesized product. In this study nanoscale molybdenum trioxide (MoO3) particles were added to micron scale nickel (Ni) and aluminum (Al). The goal was to incorporate a nanoscale additive within the reactant matrix that would produce a superalloy by generating excessively high heating rates and creating controlled quantities of Al2O3 (a strengthening agent) within the microstructure of the alloy. Ignition and flame propagation were examined using a CO2 laser and imaging diagnostics that include a copper-vapor laser coupled with a high-speed camera. Product microstructure was examined using micro-x-ray diffraction analysis and scanning electron microscopy. Abrasion testing was performed to evaluate the wear resistance properties of the superalloy. Results show that adding MoO3 increases the flame temperature, results in greater ignition sensitivity, produces a more homogeneous microstructure, and increases the overall wear resistance of the product.
AB - Advancements in nanotechnology for material processing via combustion synthesis have spurred the development of superalloys that provide improved protective properties. Nanoscale reactant particles offer unique thermal properties and increased homogeneity that improve the microstructural features and macroscopic properties of the synthesized product. In this study nanoscale molybdenum trioxide (MoO3) particles were added to micron scale nickel (Ni) and aluminum (Al). The goal was to incorporate a nanoscale additive within the reactant matrix that would produce a superalloy by generating excessively high heating rates and creating controlled quantities of Al2O3 (a strengthening agent) within the microstructure of the alloy. Ignition and flame propagation were examined using a CO2 laser and imaging diagnostics that include a copper-vapor laser coupled with a high-speed camera. Product microstructure was examined using micro-x-ray diffraction analysis and scanning electron microscopy. Abrasion testing was performed to evaluate the wear resistance properties of the superalloy. Results show that adding MoO3 increases the flame temperature, results in greater ignition sensitivity, produces a more homogeneous microstructure, and increases the overall wear resistance of the product.
UR - http://www.scopus.com/inward/record.url?scp=6344252870&partnerID=8YFLogxK
U2 - 10.1557/JMR.2004.0389
DO - 10.1557/JMR.2004.0389
M3 - Article
AN - SCOPUS:6344252870
SN - 0884-2914
VL - 19
SP - 3028
EP - 3036
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 10
ER -