metal contained in barite. Used as a heavy additive in oil well drilling; in the paper and rubber industries; as a filler or extender in cloth‚ ink and plastics products; in radiography ("barium milkshake"); as a deoxidizer for copper; a sparkplug in alloys; and in making expensive white pigments. Clays Used in floor and wall tile as an absorbent‚ in sanitation‚ mud drilling‚ foundry sand bond‚ iron pelletizing‚ brick‚ light weight aggregate and cement. It is produced in 40 states. Ball clay is used
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many pure metal phase transitions? ______ How many congruent melting points??______ Q.2 a) A 90 wt% Ag-10 wt% Cu alloy is heated to a temperature within the b + liquid phase region. If the Composition of the liquid phase is 85 wt% Ag‚ determine: (a) The temperature of the alloy (b) The composition of the b phase (c) The mass fractions of both phases b) For a copper-silver alloy of composition 25 wt% Ag-75 wt% Cu and at 775°C (1425°F) do the following: (a) Determine the mass fractions of α and
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calculated the throughput per unit of the constrained process (Rolling - CRM) by diving the unitary ABC cost ($/lb) by the machine time for the rolling process (lb/min). Exhibit 1 presents the results for these calculations. According to this approach‚ alloys‚ roller wires and chipper
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absorbing alloys that are capable of asborbing and releasing hydrogen at high-density levels. The hyroxide is for the positive electrode and the hydrogren asborbing alloys are for the negative electrode. (Figure 2) below shows the stucture of the Nick-Metal Hydride Batteries. [pic] Figure 2 – Structure of Nickel-Metal Hydride Batteries As seen in Figure 2‚ the NiMH battery is made up of a positive plate containing nickel hydroxide‚ a negative plate plate composed of hydrogen absorbing alloys‚ a speparator
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Copyright © The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display By: Pn. Nurul Ain Harmiza Abdullah Materials Engineering PTT 110 SEMESTER 1 (2013/2014) Foundations of Materials Science and Engineering‚ 5th Edn. in SI units Smith and Hashemi Copyright © The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display PowerPoint Lecture Slides for Foundations of Materials Science and Engineering Fifth Edition William F. Smith
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huts‚ tooth or bone leather tents‚ most near lakes and rivers so that they can only made use of natural material. Later in Bronze Age‚ humans started to gather and developed their own villages. They used copper and tin‚ lead‚ arsenic or antimony alloy produced tools and weapons. Ever since the production of bronze productivity of agriculture and handicrafts were improved‚ material living conditions are getting better. Iron contains high amount of hardness‚ high melting point‚ making it relatively
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← Understand the manufacture of sulphuric acid. ← Synthesise the manufacture of ammonia and its salts. ← Understand alloys. ← Evaluate the uses of synthetic polymer. ← Apply the uses of glass and ceramics. ← Evaluate the uses of composite materials. ← Appreciate various synthetic industrial materiala. (H4SO4) ← USES OF SULPHURIC ACID 1. Sulphuric acid is used to produce chemical fertilizer such as ammonium sulphate and potassium sulphate‚ which are highly soluble in water
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Studies by psychologists Alloy and Abramson (1979) and Dobson and Franche (1989) suggested that depressed people appear to have a more realistic perception of their importance‚ reputation‚ locus of control‚ and abilities than those who are not depressed. The popular claim: is that depressed people believe false ideas about themselves and others. In other words‚ they are self-deceived and out of touch with reality. This kind of self-deceptive thinking is alleged to be a factor distinguishing depressed
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as an iron carbon alloy with a minimum of 10% chromium content. The name stainless steal comes from the fact that it does not rust or corrode which makes it stainless. There are many different types of grades and surface finishes to suit the environment where the metal will be placed. Stainless steel is commonly used in balustrades‚ watch bands and household appliances. CAST IRON Cast iron is usually referred to as grey cast iron and identifies a large group of ferrous alloys. Cast iron is hard
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reference can be found by Profs John Lienhard online http://web.mit.edu/lienhard/www/ahtt.html Casting Methods • Sand Casting • Investment Casting • Die Casting High Temperature Alloy‚ Complex Geometry‚ Rough Surface Finish High Temperature Alloy‚ Complex Geometry‚ Moderately Smooth Surface Finish High Temperature Alloy‚ Moderate Geometry‚ Smooth Surface Sand Casting Sand Casting Description: Tempered sand is packed into wood or metal pattern halves‚ removed form the pattern‚ and assembled with
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