Search results
Results From The WOW.Com Content Network
Magnesium is the third-most-commonly-used structural metal, following iron and aluminium. [58] The main applications of magnesium are, in order: aluminium alloys, die-casting (alloyed with zinc), [59] removing sulfur in the production of iron and steel, and the production of titanium in the Kroll process. [60]
The machinability of magnesium alloys is the best of any commercial metal, and in many applications, the savings in machining costs more than compensate for the increased cost of the material. [ citation needed ] It is necessary, however, to keep the tools sharp and to provide ample space for the chips.
Magnesium oxide (Mg O), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg 2+ ions and O 2− ions held together by ionic bonding .
Magnesium is often alloyed with aluminum, zinc and manganese to increase its strength and corrosion resistance. [72] Magnesium has many other industrial applications, such as its role in the production of iron and steel, [further explanation needed] and in the Kroll process for production of titanium. [73]
Aluminium-magnesium alloys are considered to be very corrosion-resistant, making them suitable for marine applications, but this is only true if the -phase exists as a non-contiguous phase. Alloys with Mg contents below 3% are therefore always corrosion-resistant, with higher contents, appropriate heat treatment must ensure that this phase is ...
Another concern for the thoriated magnesium alloys is the low melting point and rapid oxidation of the metal. This can result in dangerous flash fires during the production of the alloys. Additionally, thorium-free magnesium alloys have been developed that exhibit similar characteristics to mag-thor, causing currently used magnesium-thorium ...
The primary metals in this category are magnesium-based [2] [3] and iron-based alloys, [4] although recently zinc has also been investigated. [ 5 ] [ 6 ] Currently, the primary uses of bioresorbable metals are as stents for blood vessels (for example bioresorbable stents ) and other internal ducts.
In addition to magnesium and silicon, other elements are contained in the standardized varieties. Copper is used to improve strength and hot curing in quantities of 0.2-1%. It forms the Q phase (Al 4 Mg 8 Si 7 Cu 2). Copper leads to a denser dispersion of needle-shaped, semi-coherent excretion (cluster of magnesium and silicon).