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Patent
Magnesium Elektron Ltd. | Date: 2017-06-07

This invention relates to magnesium alloys suitable for use as corrodible downhole articles, wherein the alloys have a corrosion rate of at least 50mg/cm 2 /day in 15% KCl at 93C and a 0.2% proof strength of at least 50MPa when tested using standard tensile test method ASTM B557-10. The invention also relates to methods for producing the alloys, downhole tools comprising the alloys and methods of hydraulic fracturing using the downhole tools.


Compositions useful for treating the exhaust gases of diesel engines contain zirconium oxide, silicon oxide and at least one oxide of at least one element M selected from among titanium, aluminum, tungsten, molybdenum, cerium, iron, tin, zinc, and manganese, in the following mass proportions of these different elements: silicon oxide: 5%-30%; M-element oxide: 1%-20%; the balance being zirconium oxide; such compositions also have an acidity, as measured by the methylbutynol test, of at least 90% and are prepared by placing a zirconium compound, a silicon compound, at least one M-element compound and a basic compound in a liquid medium, thereby generating a precipitate, maturing the precipitate in a liquid medium and separating and calcining the precipitate.


Grant
Agency: GTR | Branch: EPSRC | Program: | Phase: Research Grant | Award Amount: 3.23M | Year: 2014

The manufacturing and processing of metals to form components is one of the largest industrial sectors and accounts for 46% of all manufactured value, with an economic value to the EEA of Euro 1.3 trillion annually. Material security concerns the access to raw materials to ensure military and economic sufficiency. We will face major future challenges as key elements will be increasingly in short supply with consequent price volatility (the ticking time bomb). Equally, many materials rely on strategic elements for which supply is not guaranteed, with rare earth elements being the prime example (central to the performance of magnesium alloys). Metals production consumes about 5% of global energy use and is responsible for an annual emission of over 2Gton of CO2, so efficiency in manufacture can produce significant reductions in environmental impact. The recent report Material Security: Ensuring resource availability for the UK economy from the TSB noted the importance of material security has increased due to limited short-term availability of some raw materials, widespread large increases in raw material prices, oligopolistic industry structures and dependence on a limited number of sometimes politically unstable countries as sources of key materials. Furthermore, The issue of sustainability has attained unprecedented prominence on both national and international agendas, occupying the minds of businesses and governments as never before... Resource efficiency has a key role to play in mitigating wider issues such as depletion of resources, environmental impact and materials security, and it also contributes significantly to the low-carbon economy. Addressing resource efficiency in metals production and use requires that new metal alloys be developed specifically to reduce reliance on strategic and scarce elements, for recycling and for disruptive manufacturing technologies that minimise waste. The size of the problem is too large to be undertaken by the traditional matrix experiment. Rather, a wide range of state-of-the-art modelling, experimental and processing skills needs to be brought together to target resource efficiency in metallic systems. In the DARE approach we use basic science to come to an understanding of the role of strategically important elements, to design new alloys with greater resource efficiency and to optimise the processing route for the new alloys to give supply chain compression. Unique to the DARE approach is to bring manufacturing into the centre of the alloy design paradigm. The combined themes will tackle key metal alloys, including ultra-high strength, low alloy and nanostructured steel (e.g. for a resource efficient approach to vehicle light weighting to give reduced automotive emissions); titanium alloys and titanium aluminides (e.g. for aerospace applications) and Mg alloys (e.g. in automotive and military applications, for example, cast gear box casings). The research team and their ten industrial partners will deliver actual materials and implementation into industry, moving the resource efficiency agenda from the sphere of policy into the real economy. We will support the growth of the high-value UK speciality metals manufacturing industry by developing and exploiting the DARE approach to the design of alloys that improve the resource efficiency and flexibility with regard to fluctuating material availability of the UK manufacturing economy, addressing the EPSRC grand challenges in transitioning to a low-carbon society. This will help existing UK world-leading industries to expand and manufacture for the future.


Compositions useful for treating the exhaust gases of diesel engines contain zirconium oxide, silicon oxide and at least one oxide of at least one element M selected from among titanium, aluminum, tungsten, molybdenum, cerium, iron, tin, zinc, and manganese, in the following mass proportions of these different elements: silicon oxide: 5%-30%; M-element oxide: 1%-20%; the balance being zirconium oxide; such compositions also have an acidity, as measured by the methylbutynol test, of at least 90% and are prepared by placing a zirconium compound, a silicon compound, at least one M-element compound and a basic compound in a liquid medium, thereby generating a precipitate, maturing the precipitate in a liquid medium and separating and calcining the precipitate.


Patent
Magnesium Elektron Ltd. | Date: 2011-03-23

Magnesium alloys which possess good processability and/or ductility whilst retaining good resistance to corrosion and/or degradation comprising Y: 0-10% by weight, Nd: 0-5% by weight, wherein the total of Y+Nd is at least 0.05% by weight, one or more heavy rare earths selected from Ho, Lu, Tm and Tb in a total amount of above 0.5% and no more than 5.5% by weight, Gd: 0-3.0% by weight, and Sm: 0-0.2% by weight. The alloy optionally includes one or more of: Dy: 0-8% by weight; Zr: 0-1.2% by weight; Al: 0-7.5% by weight; Zn and/or Mn: 0-2% by weight in total; Sc: 0-15% by weight; In: 0-15% by weight; Ca: 0-3% by weight; Er up to 5.5% by weight, provided that the total of Er, Ho, Lu, Tm and Tb is no more than 5.5% by weight; and one or more rare earths and heavy rare earths other than Y, Nd, Ho, Lu, Tm, Tb, Dy, Gd and Er in a total amount of up to 0.5% by weight; the balance being magnesium and incidental impurities up to a total of 0.3% by weight.


A method is described for treating a gas including nitrogen oxides (NO_(x)). The method can include conducting a reduction reaction of the nitrogen oxides with a nitrogen reducing agent. Further described, is a catalyst used for the reduction reaction which is a catalytic system including a composition based on cerium oxide and including niobium oxide in a proportion by a mass of from 2% to 20%.


Patent
Magnesium Elektron Ltd. and Rhodia | Date: 2011-05-17

A composition based on cerium, zirconium and tungsten is described. The composition has a content expressed as an oxide, of which cerium is from 5% to 30% of the composition, tungsten is from 2% to 17% of the composition, and the remainder of the composition is zirconium. After aging at 750 C. under an air atmosphere including 10% water, it has a two-phase crystallographic structure having a tetragonal zirconia phase and a monoclinic zirconia phase, with no presence of a crystalline phase including tungsten. The composition can be used as a catalyst, especially in an SCR process.


The invention relates to a method for treating a gas containing nitrogen oxides (NOx), in which an NOx-reduction reaction is carried out using a nitrogen-containing reducing agent, which invention is characterized in that the catalyst used for the reduction reaction is a catalytic system containing a composition comprising zirconium, niobium in the following percentages by weight, expressed in terms of the weight of oxide: 10-50% of cerium, 5-20% of niobium and the remainder consisting of zirconium.


Patent
Magnesium Elektron Ltd. | Date: 2015-07-28

A magnesium alloy suitable for use as a corrodible downhole article. The alloy has a corrosion rate of at least 50 mg/cm^(2)/day in 15% KCl at 93 C. and a 0.2% proof strength of at least 50 MPa when tested using standard tensile test method ASTM B557-10.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP-2010-4.0-3 | Award Amount: 22.10M | Year: 2011

The core concept of Accelerated Metallurgy is to deliver an integrated pilot-scale facility for the combinatorial synthesis and testing of many thousands of unexplored alloy formulations. This facility would be the first of its kind in the world and would represent a significant advance for metallurgy. The novel technology that enables this HTT facility is based on automated, direct laser deposition (DLD). The key feature of this technology is the way in which a mixture of elemental powders is accurately and directly fed into the lasers focal point, heated by the laser beam, and deposited on a substrate in the form of a melt pool, which finally solidifies to create a unique fully-dense alloy button with precise stoichiometry. This robotic alloy synthesis is 1000 times faster than conventional manual methods. Once produced, these discrete mm-sized samples are submitted to a range of automated, standardised tests that will measure chemical, physical and mechanical properties. The vast amount of information will be recorded in a Virtual Alloy Library and coupled with computer codes such as neural network models, in order to extract and map out the key trends linking process, composition, structure and properties. The most promising alloy formulations will be further tested, patented and exploited by the 20 end-users. Industrial interests include: (i) new lightweight fuel-saving alloys (<4.5 g/cm3) for aerospace and automotive applications; (ii) new higher-temperature alloys (stable>1000C) for rockets, gas turbines, jet-engines, nuclear fusion; (iii) new high-Tc superconductor alloys (>30K) that can be wire-drawn for electrical applications; (iv) new high-ZT thermoelectric alloys for converting waste heat directly into electricity; (v) new magnetic and magnetocaloric alloys for motors and refrigeration; and (vi) new phase-change alloys for high-density memory storage. The accelerated discovery of these alloy formulations will have a very high impact on society.

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