For billionaires, the new crown epidemic is like a 'gold rush'! The Deutsche Presse-Agentur said on the 17th that in 2022, the wealth held by the world's top ten richest people will jump from $700 billion to $1.5 trillion, an average daily increase of $1.3 billion, an increase that exceeds the past 14 years. These 10 people The wealth held by the world’s poorest 3.1 billion people is six times greater than that of the world’s poorest 3.1 billion people. The 10 richest Germans have increased their assets from the equivalent of about 125 billion euros to about 223 billion euros since the start of the Covid-19 pandemic, An increase of about 78%. This wealth is roughly equivalent to the total wealth of the poorest 40% of the population, or 33 million Germans.
In the future, demand for Inconel718 powders will grow as fast as the wealth of the rich during the pandemic.
The effects of boron and silicon elements: significantly reduce the melting point of the alloy, expand the temperature range of the solid-liquid line, and form a low-melting eutectic; deoxidation and reduction and slag-making functions; hardening and strengthening of the coating; improving the performance of the operation process.
The role of copper: improve the corrosion resistance to non-oxidizing acids.
The role of chromium: solid solution strengthening, passivation; improve corrosion resistance and high temperature oxidation resistance; excess chromium easily forms chromium carbide and chromium boride hard phases with carbon and boron to improve alloy hardness and wear resistance .
The role of molybdenum element: large atomic radius, large distortion of the crystal lattice after solid solution, significantly strengthening the alloy matrix, improving the high temperature strength and red hardness of the matrix; it can cut off and reduce the network structure in the coating; improve the resistance to cavitation , Erosion ability nickel-based precision alloy.
Including nickel-based soft magnetic alloys, nickel-based precision resistance alloys, and nickel-based electric heating alloys. The most commonly used soft magnetic alloy is Permalloy with about 80% nickel. Its maximum permeability and initial permeability are high, and its coercivity is low. It is an important core material in the electronics industry. The main alloying elements of nickel-based precision resistance alloys are chromium, aluminum, and copper. This alloy has high resistivity, low temperature coefficient of resistivity and good corrosion resistance, and is used to make resistors. Nickel-based electric heating alloy is a nickel alloy containing 20% chromium. It has good oxidation and corrosion resistance and can be used for a long time at a temperature of 1000 to 1100 ℃.
Nickel-based shape memory alloy
A nickel alloy containing 50(at)% titanium. The recovery temperature is 70°C, and the shape memory effect is good. A small change in the ratio of nickel-titanium components can change the recovery temperature within the range of 30 to 100°C. It is mostly used in the manufacture of automatic opening structural parts used in spacecraft, self-exciting fasteners used in the aerospace industry, artificial heart motors used in biomedicine, etc.
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Researchers at the Centre for Translational Atomic Materials at Swinburne University of Technology, Melbourne, Australia have developed a new graphene film that absorbs more than 90% of sunlight while eliminating most of the infrared thermal emission losses, a highly efficient A solar-heated metamaterial capable of rapidly heating to 83 degrees Celsius (181 degrees Fahrenheit) in an open environment with minimal heat loss. Proposed applications for the film include thermal energy harvesting and storage, solar thermal power generation, and seawater desalination.
Molybdenum Carbide, with the chemical formula Mo2C. It has the characteristics of high melting point and hardness, good thermal stability and mechanical stability.…
Titanium diboride (TiB2) is the most stable compound among boron and titanium, and is mainly used for the preparation of composite ceramic products.…