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DM terms 3
Terminology of matter and adhesion
| Question | Answer |
|---|---|
| A material substrate that is bonded to another material by means of an adhesive | Adherend |
| A molecular or atomic attraction between two contacting surfaces promoted by the interfacial force of attraction between the molecules or atoms of two different species | Adhesion |
| Substance that promotes adhesion of one substance or material to another | Adhesive |
| Process of joining two materials by means of an adhesive agent that solidifies during the bonding process | Adhesive bonding |
| Force of molecular attraction between molecules or atoms of the same species | Cohesion |
| Angle of intersection between a liquid and a surface of a solid that is used as a measure of wettability, whereby no wetting occurs at a contact angle of ___A___° and complete wetting occurs at an angle of ___B___° | Contact angle; A=180; B=0 |
| Proportionality constant representing the amount of a substance diffusing through a unit area and a unit thickness under the influence of a unit concentration gradient at a given temperature | Diffusion coefficient |
| Temperature at which a sharp increase in the thermal expansion coefficient occurs, indicating increased molecular mobility | Glass transition temperature |
| Thermal energy required to convert a solid to a vapor | Heat of vaporization |
| Thermal energy required to convert a solid to a liquid | Latent heat of fusion |
| Relative linear change in length per unit of initial length during heating of a solid per °K within a specified temperature range | Linear coefficient of expansion |
| Equilibrium temperature at which heating of a pure metal, compound, or eutectic alloy produces a change from a solid to liquid | Melting temperature (melting point) |
| Mechanical adhesion associated with bonding of an adhesive to a roughened adherend surface | Micromechanical bonding |
| Tenacious deposit of microscopic debris that covers enamel and dentin surfaces that have been prepared for a restoration | Smear layer |
| Interfacial tension, usually between a liquid and a solid surface, which occurs because of unbalanced intermolecular forces | Surface tension |
| Relative affinity of a liquid for the surface of a solid | Wettability |
| Relative interfacial tension between a liquid and a solid substrate that results in a contact angle of less than 90° | Wetting |
| Short-range force of physical attraction that promotes adhesion between molecules of liquids or molecular crystals | van der Waals forces |
Created by:
sean.sebourn
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