What is meant by metallic glasses?
Metallic glasses (sometimes also referred to as glassy metals or, inappropriately, as amorphous metals) are noncrystalline materials composed of either pure metals or combinations of metals and metalloids. They are metals in the sense that their electrical, magnetic, and optical properties are typical of metals.
What are metallic glasses used for?
Vitrified metals, or metallic glasses, are at the frontier of materials science research. They have been made by rapidly cooling alloys of various metals including, zirconium, palladium, iron, titanium, copper, and magnesium, and used for a variety of applications from making golf clubs to aerospace construction.
What are metallic glasses give example?
Some of the examples of metal–metal type metallic glasses are Ni–Nb, Mg–Zn, Hf–V, Cu–Zr, etc. Metals can be alkali, alkaline and rare earth metals etc. In metal–metal type, the atomic percentage of individual constituents can be up to 50%.
How are metallic glasses formed?
Explanation: Quenching means rapid cooling. Actually atoms of any material move freely in a liquid state. Atoms can be arranged regularly when a liquid is cooled slowly. Instead, when a liquid is quenched, there will be an irregular pattern, which results in the formation of metallic glasses.
What are the types of metallic glasses and mention few metallic glasses?
Metal – metalloid metallic glasses.
- Metal – metal metallic glasses. They are formed by combination of metals. Example: Ni – Nb (Nickel & Niobium).
- Metal – metalloid metallic glasses. They are formed by combination of metals and metalloid. Example: Metals like Fe, Co, Ni and metalloid such as B, Si, C, P.
What are metallic glasses How are they prepared?
The principle used in making metallic glasses is extreme rapid cooling of the molten alloy. The technique is called as rapid quenching. The cooled molten alloys are fed into highly conducting massive rollers at high speeds to give ribbons of metallic glasses.
Is metallic glass transparent?
“Metallic glass” is not transparent. This terminology refers to the amorphous [Gr: “without form”] atomic structure of the material. The substance (metal) has been cooled from a molten-state so quickly that crystal grains or structures do not have time to form.
How are metallic glasses different from other materials?
Introduction Metallic Glasses are the newly developed engineering materials. Metallic Glasses share the properties of both metals and alloys. Most metals and alloys are crystalline, i.e., their atoms are arranged in some regular pattern that extends over a long distance. In contrast, glass is an amorphous (non-crystalline), brittle and 4.
How are metallic glasses used in power transformers?
Metallic glasses are used as transformer core material in high- power transformers.Usage of metallic glasses in transformers is found to improve the efficiency of power distribution in transformers.These transformers are used to convert high-voltage current into low-voltage current to be used for domestic appliances (120 V and 240V). 2.
What are the properties of metal and glass?
Metallic glasses share the properties of both metals and alloys. Most metals and alloys are crystaline,i.e., their atoms arranged in some regular pattern that extends over a long distance. In contrast,glass is an amorphous,brittle and transparent solid.
What kind of material is used to melt glass?
The melt spinning process technique involved in the preparation of metallic glass is illustrated in figure. In this technique,there is a spinning disc made of copper.