Cold bonding of alumina: Fractured and re-bonding under compression
Source abstract
Abstract
Abstract Cold bonding of metals necessitates high normal/frictional loads, or ultrahigh-vacuum treated atomically flat ductile surface. In case of ceramics composed of ionic and/or covalent bonds, the high diffusion barrier of ions or atoms gives them a constraint to bond together at room temperature. However, from this investigation, it has been found that alumina crystals could be well bonded at room temperature under high pressure. Also, it has been noticed that if the pressure is capable of yielding and breaking down alumina crystals, it could then re-bond the fractured crystals by reducing the distance of their surface atoms to meet the condition for bonding. Overall, we demonstrate a process for the cold bonding of alumina under high pressure with grain fracturing and re-bonding.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Intermetallics and Advanced Alloy Properties · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Pauling · 1960
2. Contact adhesion of thin gold films on elastomeric supports: cold bonding under ambient conditions10.1126/science.253.5021.776 ↗
3. Atomic process of point contact in gold studied by time-resolved high-resolution transmission electron microscopy10.1103/PhysRevLett.81.4448 ↗
4. Cold bonding of ultrathin gold nanowires10.1038/nnano.2010.4 ↗
5. Electronic structure of α-alumina and its defect states10.1103/PhysRevB.28.982 ↗
6. Microwave sintering of transparent alumina10.1016/S0167-577X(02)00557-8 ↗
7. Transparent alumina by vacuum sintering10.1016/j.jeurceramsoc.2012.02.039 ↗
8. Transparent polycrystalline alumina ceramics with orientated optical axes10.1111/j.1551-2916.2008.02611.x ↗
9. Transparent sintered corundum with high hardness and strength10.1111/j.1151-2916.2003.tb03270.x ↗
10. Effect of grain boundary microcracking on the light transmittance of sintered transparent MgAl2O410.1016/S0955-2219(02)00205-4 ↗
11. Highly transparent α-alumina obtained by low cost high pressure SPS10.1016/j.ceramint.2012.10.012 ↗
12. Transparent nanocrystalline bulk alumina obtained at 7.7 GPa and 800 °C10.1016/j.scriptamat.2013.05.017 ↗
13. Plastic deformation and sintering of alumina under high pressure10.1063/1.4844495 ↗
14. Bimodal transparent alumina ceramics prepared with micro/nano-particles under high pressure10.1016/j.scriptamat.2016.05.017 ↗
15. Low-temperature high-pressure preparation of transparent nanocrystalline MgAl2O4 ceramics10.1063/1.2207571 ↗
16. Nanosintering mechanism of MgAl2O4 transparent ceramics under high pressure10.1016/j.matchemphys.2010.05.009 ↗
17. Transparent nanocrystalline spinel by room temperature high-pressure compaction10.1016/j.scriptamat.2013.05.014 ↗
18. Method of preparation and structural properties of transparent YAG nanoceramics10.1016/j.optmat.2006.05.016 ↗
19. High-pressure sintering mechanism of yttrium aluminum garnet (Y3Al5O12) transparent nanoceramics10.1016/j.scriptamat.2011.11.012 ↗
20. Ultrahard nanotwinned cubic boron nitride10.1038/nature11728 ↗
21. Diamond-cBN alloy: a universal cutting material
22. High pressure compaction of nanosize ceramic powders10.1557/JMR.1997.0111 ↗
23. Design and assembly of split-sphere high pressure apparatus based on the hinge-type cubic-anvil press10.7498/aps.57.5429 ↗
24. Research on pressure generation efficiency of 6-8 type multianvil high pressure apparatus10.7498/aps.59.3107 ↗
25. Superhard composites of cubic silicon nitride and diamond10.1016/j.diamond.2012.05.013 ↗
26. Fixed points for pressure calibration above 100 kbars related to semiconductor‐metal transitions10.1063/1.327984 ↗
27. Fragmentation and stress diversification in diamond powder under high pressure10.1063/1.5051749 ↗
28. Yield strength of Al2O3 at high pressures10.1103/PhysRevB.42.2532 ↗
29. The strength of ruby from X-ray diffraction under non-hydrostatic compression to 68 GPa10.1007/s00269-014-0664-2 ↗