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Electron Metal
Elektron is the registered trademark of a wide range of magnesium alloys manufactured by a British company Magnesium Elektron Limited. There are about 100 alloys in the Elektron range, containing from 0% to 9.5% of some of the following elements in varying proportions: aluminium (< 9.5%), (5.25%), (2.7%), (2.5%), (1.3%), (0.9%), |
Electrum
Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially, and is also known as " green gold".Emsley, John (2003Nature's building blocks: an A–Z guide to the elements Oxford University Press. . p. 168 Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks. It was also used in the making of ancient drinking vessels. The first known metal coins made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC. For several decades, the medals awarded with the Nobel Prize have been made of gold-plated green gold. Etymology The name "electrum" is the Latinized form of the Greek word ἤλεκτρον (''ḗlektron''), mentioned in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corrosion
Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion. In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen, hydrogen or hydroxide. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion. This type of damage typically produces oxide(s) or salt(s) of the original metal and results in a distinctive orange colouration. Corrosion can also occur in materials other than metals, such as ceramics or polymers, although in this context, the term "degradation" is more common. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases. Many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War I
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fighting occurring throughout Europe, the Middle East, Africa, the Pacific Ocean, Pacific, and parts of Asia. An estimated 9 million soldiers were killed in combat, plus another 23 million wounded, while 5 million civilians died as a result of military action, hunger, and disease. Millions more died in Genocides in history (World War I through World War II), genocides within the Ottoman Empire and in the Spanish flu, 1918 influenza pandemic, which was exacerbated by the movement of combatants during the war. Prior to 1914, the European great powers were divided between the Triple Entente (comprising French Third Republic, France, Russia, and British Empire, Britain) and the Triple A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IG Farben
Interessengemeinschaft Farbenindustrie AG (), commonly known as IG Farben (German for 'IG Dyestuffs'), was a German chemical and pharmaceutical conglomerate. Formed in 1925 from a merger of six chemical companies— BASF, Bayer, Hoechst, Agfa, Chemische Fabrik Griesheim-Elektron, and Chemische Fabrik vorm. Weiler Ter Meer—it was seized by the Allies after World War II and divided back into its constituent companies. IG Farben was once the largest company in Europe and the largest chemical and pharmaceutical company in the world. IG Farben scientists made fundamental contributions to all areas of chemistry and the pharmaceutical industry. Otto Bayer discovered the polyaddition for the synthesis of polyurethane in 1937, and three company scientists became Nobel laureates: Carl Bosch and Friedrich Bergius in 1931 "for their contributions to the invention and development of chemical high pressure methods", and Gerhard Domagk in 1939 "for the discovery of the antibacterial ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voisin 1907 Biplane
The 1907 Voisin biplane (designated the Voisin II by the 1913 edition of '' Jane's All the World's Aircraft''), was the first successful powered aircraft designed by aeronautical engineer and manufacturer Gabriel Voisin. It was used by the French aviator Henri FarmanBorn in France to British father, Henri (or Henry) Farman took French nationality in 1937 to make the first heavier-than-air flight lasting more than a minute in Europe, and also to make the first full circle. The first examples of the aircraft were known by the name of their owners, for instance the Delagrange I, or the Henri Farman n°1. Farman made many modifications to his aircraft, and these were incorporated into later production aircraft built by Voisin. The type enjoyed widespread success, and around sixty were built. Background Between 1904 and 1908 there was fierce competition between European aviation experimenters attempting to achieve powered heavier-than-air flight. Although the Wright Brothe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Euler
August Euler (20 November 1868 – 1 July 1957) was a pioneer German aviator, aircraft constructor and the holder of the first German pilot's license, issued in 1909. After the First World War, he became German Secretary of State for Air, until he retired in 1922. Euler was born at Oelde in Westphalia and was educated at Oelde and at public schools in Cologne and Aachen and from 1885 started a career in engineering. He worked for Seidel & Neumann, originally a sewing machine company, which later made cycles and motor cars. Euler took up cycle racing and then motor racing and became interested in aviation. In 1908 he started a company to build Voisin aircraft under licence. In February 1908 August Euler erected a building on the site of the Griesheim Airport Griesheim Airport is a private airfield in Germany, located southwest of Griesheim (Hessen); approximately southwest of Berlin. Formerly a NATO military airfield, it was closed in 1992. In 1996, a large part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adler (automobile)
Adler was a German automobile and motorcycle manufacturer from 1900 until 1957. The'' 'Adler' '' name is German for 'eagle'. History The Adler factory produced bicycles, typewriters, motorcycles and calculators in addition to cars. Before World War I, the company used De Dion two- and four-cylinder engines in cars that ranged from 1032 cc to 9081 cc; beginning in 1902 (the year Edmund Rumpler became technical director), they used their own engines as well. These cars, driven by Erwin Kleyer and Otto Kleyer (sons of the company founder Heinrich Kleyer) and by Alfred Theves won many sporting events. In the 1920s, Karl Irion raced many Adlers; popular models of the period included the 2298 cc, 1550 cc, and 4700 cc four-cylinders and the 2580 cc six-cylinders. A few of the Standard models, built between 1927 and 1934, featured Gropius-designed coachwork. The Adler Standard 6, which entered volume production in 1927, had a 2540 cc or 2916 cc six-cylinder engine, while the Adler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankfurt Am Main
Frankfurt, officially Frankfurt am Main (; Hessian dialects, Hessian: , "Franks, Frank ford (crossing), ford on the Main (river), Main"), is the most populous city in the States of Germany, German state of Hesse. Its 791,000 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located on its namesake Main (river), Main River, it forms a continuous conurbation with the neighboring city of Offenbach am Main and Frankfurt Rhein-Main Regional Authority, its urban area has a population of over 2.3 million. The city is the heart of the larger Rhine-Main metropolitan region, which has a population of more than 5.6 million and is Germany's Metropolitan regions in Germany, second-largest metropolitan region after the Rhine-Ruhr region. Frankfurt's central business district, the Bankenviertel, lies about northwest of the geographic centre of the EU, geographic center of the EU at Gadheim, Lower Franconia. Like France and Franc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the south. Its 16 constituent states have a total population of over 84 million in an area of . It borders Denmark to the north, Poland and Czechia to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its main financial centre is Frankfurt; the largest urban area is the Ruhr. Settlement in what is now Germany began in the Lower Paleolithic, with various tribes inhabiting it from the Neolithic onward, chiefly the Celts. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Griesheim (Frankfurt Am Main)
Griesheim () is a quarter of Frankfurt am Main, Germany. It is part of the ''Ortsbezirk West''. Griesheim had been an independent town until 1928, the year of its suburbanisation. It is located between Nied The Nied (; ) is a river in Lorraine, France, and Saarland, Germany. It is a left tributary of the Saar. It is formed where two streams converge: the ''Nied allemande'' ("German Nied") and the ''Nied française'' ("French Nied"), which join ..., Sossenheim, Bockenheim, Gallus and Schwanheim. References External links Geschichtsverein Griesheim„Griesheim, Gemeinde Frankfurt am Main“, in: Historisches Ortslexikon Districts of Frankfurt {{Hesse-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitterfeld
Bitterfeld () is a town in the district of Anhalt-Bitterfeld, Saxony-Anhalt, Germany. Since 1 July 2007 it has been part of the town of Bitterfeld-Wolfen. It is situated approximately 25 km south of Dessau, and 30 km northeast of Halle (Saale). At the end of 2016, it had 40,964 inhabitants. History and description The name Bitterfeld most likely comes from the Middle High German words ''bitter'' and ''Feld'' and so means "boggy land". Bitterfeld was built by a colony of Flemish immigrants in 1153. The first documentary mention is from 1224. It was captured by the landgrave of Meissen in 1476, and belonged thenceforth to Saxony, until it was ceded to Prussia in 1815. By 1900, Bitterfeld station was an important junction of the Berlin–Halle and the Magdeburg–Leipzig railways. The population at that time was 11,839; it manufactured drainpipes, paper roofing, and machinery, and had sawmills. There were also several coal mines in the vicinity. Owing to its pleasant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerospace Engineering
Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: aeronautical engineering and astronautical engineering. Avionics engineering is similar, but deals with the electronics side of aerospace engineering. "Aeronautical engineering" was the original term for the field. As flight technology advanced to include vehicles operating in outer space, the broader term "aerospace engineering" has come into use. Aerospace engineering, particularly the astronautics branch, is often colloquially referred to as "rocket science". Overview Flight vehicles are subjected to demanding conditions such as those caused by changes in atmospheric pressure and temperature, with structural loads applied upon vehicle components. Consequently, they are usually the products of various technological and engineering disciplines including aerodynamics, Air propulsion, avionics, materials science, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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