Alumina Ceramic Cylinders Lot Of 2 - 10" And 8"

US $400

Reno, Nevada, United States
May 25th

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LOT OF 2 ALUMINA CERAMIC CYLINDERS10" - 3" IN DIAMETER 8" - 2 3/8" IN DIAMETER Alumina Ceramic Hardness is a good indicator of a materials' ability to withstand mechanical wear and abrasion. Alumina ceramics are among the hardest materials known-harder than tool steel or tungsten carbide. In fact, alumina ceramics are as hard as sapphire, making them excellent choices for severe-wear applications such as mill and chute linings, bearings and wear plates in addition to those applications already mentioned. Compressive Strength High alumina ceramics also have exceptional compressive strength, again with values exceeding that of tool steel. Compared to electrical insulator materials such as fused quartz or porcelain, alumina provides two to five times the compressive strength; and values far exceed those of glass, plastics and steatite. The high compressive strength of alumina, even at elevated temperatures, provides long life in structural applications, while other materials may fail due to distortion under load. Stability. Metals frequently warp or distort during machining or heat cycling. Plastics tend to flow under pressure, and sometimes upon aging. This creates problems for the designer, often necessitating compromises in design to allow for deformation or warping. The extreme hardness, modulus of elasticity and low thermal expansion of alumina ceramics means that, within the limits of their tensile and compressive strengths, they will maintain original dimensions under high load and high temperature conditions and aging. Typical room temperature modulus of elasticity values, ranging from 32 x 106 psi to 56 x 106 psi demonstrate the rigidity of aluminas. Exceptional thermal stability assures precision fits over widely varying conditions of loading, speed and vibration. This makes aluminas a good choice for applications such as mechanical seal rings, air bearings, precision valves and wire-drawing components.