Chemical laser

transferred to the printer that controls “a nozzle that extrudes heated thermoplastic” to build each layer of on top of each other. Since the object is built on a base, the finished product can be easily removed. The third method is called Selective Laser Sintering (SLS).[6] This method works similarly to SLA, but it uses powered materials instead of liquid resin. All of the current competing methods to CLIP are based on a layer-by-layer approach, which is not only timing consuming, but the…

The principle of physical governing the measurement system is the Doppler Effect that occurs when the laser beam is reflected from a small area of the testing object that vibrate. The figure below gives the pictorial representation of the Doppler Effect. The loudspeaker represents a sound source and it is assumed that the observer is standing on the right…

CHAPTER – 1 1. INTRODUCTION Carbon nanotubes are allotropes of carbon with cylindrical nanostructure. Constructed with length-to - diameter ratio of up to 132,000,000 :1. These cylindrical carbon molecules have unusual properties, which are valuable for nanotechnology, electronics, optics and other fields of materials science and technology. Nanotubes are members of fullerene structural family. Nanotube’s walls are formed by one-atom thick sheet of carbon called Graphene. The combination of…

obtained from chemical compounds. This curiosity was noted previously by Henry Cavendish, but it remained anonymous. ("Neon," 1999). In 1898, a Scottish chemist Sir William Ramsay (1852-1916) and English chemist Morris M. Travers (1872-1961) discovered neon just after they discovered the element krypton that same year. ("Neon," 2000). Physical Description Neon is the second element in Group 18 of the periodic table, a group of elements known as the inert or noble gases. Neon’s chemical…

motion of electrons in the chemical bonds. Controlling this fast electron motion, in turn, allows to control the molecular structure change. Additionally, the ability to take snapshots of the electron motion dynamics will improve our…

Greek 'helios' meaning sun, as it was in the sun's corona. Helium is a gaseous chemical element,with a symbol of He. Its atomic number is 2 and atomic weight is 4.0026. Helium is one of the noble gases on the periodic table. It’s the second lightest element. Helium is a colourless, odourless, insipid and non-toxic gas. It’s less soluble in water than any other gas. It’s the less reactive element and doesn’t form chemical compounds. The density of helium vapour is very low, but has high…

This essay examines the implications of waste in design and manufacturing with regard to the nature and future sustainability of practices considered modern by contemporary standards. Practices, such as CNC (computer numerically controlled) machining and additive manufacturing such as 3D printing, are the benchmark for modern manufacturing; 'In the domain of manufacturing, computer numerically controlled (CNC) technology is a major contributor to the production capacity of the…

Synthesis of reactive iron Chemical reduction method of Ferric chloride by sodium borohydride following reaction (Eq.1), was used to synthesize ZVI [14]. 〖2FeCl〗_3+〖6NaBH〗_4+〖18H〗_2 O→〖2Fe〗^0+〖21H〗_2+〖6B(OH)〗_3+6NaCl (1) Ferric chloride hexahydrate solution was prepared by dissolving 5 g of FeCl_3.H_2 O (99.0%, Junsei Chemical Co., Japan) in 125 mL of deoxygenated deionized (DI) water. Moreover, 3.5 g of Sodium borohydride (NaBH_4, 98.0%, Sigma–Aldrich Inc., USA) were dissolved in 125 mL…

hair growth all deal with chemistry in their own way. They all have certain chemical reactions and chemical changes that affect the way our bodies work. Even though we study different curriculums during chemistry such as the chemical equations, chemical reactions, and other things we have learned go far beyond what is said in class. During food digestion there are chemical and physical changes occurring. One chemical change for example would be, metabolic rate which is the rate of…

apparatus(SLA) machine in 1983, and then 3 years later, in 1986, went on to patent his creation, and co-found 3d Systems with that success. On the other hand, Carl Deckard was working on his own RP(Rapid prototype) machine, which he termed Selective Laser Sintering(SLS). -For what may it be used (needs addressed and/or functions performed)? 3d printing, or…