A Study of Selected Properties and Applications of AlMgB14 and Related Composites: Ultra-Hard Materials
- Iowa State Univ., Ames, IA (United States)
This research presents a study of the hardness, electrical, and thermal properties AlMgB14 containing Al2MgO4 spinel. This research also investigated how much Al2MgO4 spinel consistently forms with AlMgB14, if AlMgB14 materials can be produced by hot isostatic pressing (HIP), what effects TiC and TiB2 have on this composite material, and the importance of mechanical alloying. Included also is a study of the variation in hardness measurements and how they relate to SI units. Heretofore, all ultra-hard materials (hardness > 40 GPA) have been found to be cubic in structure, electrical insulators, and expensive; the behavior of AlMgB14, which in certain specimens and compositions can have hardness values greater than 40 GPa, is therefore quite unusual since it is non-cubic, conductive, and moderate in cost. This offers an opportunity to investigate the relationship between hardness, thermal, and electrical properties from a new perspective. The main purpose of this project was to characterize the different properties of the AlMgB14 materials and to demonstrate that this material can be made in bulk. The technologies used for this study include microhardness measurement techniques, scanning electron microscopy, energy dispersive spectroscopy, x-ray diffraction spectroscopy, x-ray diffraction spectroscopy at different temperatures, optical microscopy, thermomechanical analysis, differential thermal analysis, 4-point probe resistivity, density techniques, Seebeck Effect, and Hall Effect. This research may lead to use of this material for applications where high abrasion resistance along with electrical conduction is needed. Also this research gave more information about a material that could have a great impact on industrial applications.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- W-7405-Eng-82
- OSTI ID:
- 803740
- Report Number(s):
- IS-T 2184; TRN: US200302%%303
- Resource Relation:
- Other Information: TH: Thesis (M.S.); Submitted to Iowa State Univ., Ames, IA (US); PBD: 28 May 2002
- Country of Publication:
- United States
- Language:
- English
Similar Records
A new class of ultra-hard materials based on AlMgB{sub 14}
Pulsed laser deposition of AlMgB14 thin films