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Sales policy for domestic USA customers.

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Compression Mounting Compounds<br />

Tips, Tricks & Techniques:<br />

For best per<strong>for</strong>mance of your mounting press and media:<br />

■ Do not compression mount soft, low melting point alloys, wood,<br />

plastic or very friable materials. Castable mounting media will<br />

provide better results.<br />

■ Apply Release Agent 20-8185-002 to mold <strong>for</strong> easy removal.<br />

■ To permanently label specimens when using opaque mount<br />

media, fill most of the mold cylinder with mount media be<strong>for</strong>e<br />

adding a thin layer of TransOptic media. Place a typed label<br />

over the TransOptic powder, then cover it with a second layer of<br />

TransOptic powder. When cured, this preserves the label in a<br />

clear layer of media <strong>for</strong> easy sample identification.<br />

■ To eliminate ”cotton balls” in TransOptic mounts, increase cool<br />

time and/or reduce molding temperature <strong>for</strong> improved mount<br />

clarity.<br />

■ Reheating TransOptic mounts to 110 °C <strong>for</strong> 15 – 30 minutes will<br />

allow <strong>for</strong> the removal of the sample. Wearing heat-resistant<br />

gloves, apply pressure to the media near the sample with<br />

pliers. This should flex the mount, allowing the media to break<br />

away from the sample with increasing pressure.<br />

■ Mounting samples off-center <strong>for</strong> EBSD evaluation facilitates<br />

beam positioning.<br />

Troubleshooting:<br />

■ Mount media that appears frosted or unfused from the<br />

mounting press is often a sign of insufficient molding<br />

temperatures. Check to ensure the temperature setting on<br />

the mounting press is 150 °C or higher and that the heating<br />

element is tightened on the mold cylinder. For the SimpliMet®<br />

1000 and 3000 Mounting Presses, this is done by turning<br />

the cylinder locking screw counter-clockwise until the screw<br />

is loose.<br />

■ Uncured mounts can be caused by too much moisture in<br />

the media. Ensure that containers are properly closed<br />

between uses.<br />

■ Ensure that enough mounting media is placed into mold to<br />

sufficiently cover the sample. If not enough mount media is<br />

used, the mounting media may not be compressed enough to<br />

cure properly and could cause damage to the mold cylinders<br />

and ram assembly.<br />

■ Radial splitting of cured mounts is often caused by samples<br />

with sharp corners or those that are too large <strong>for</strong> the mold size.<br />

Reducing sample size and/or grinding off sharp corners is<br />

recommended.<br />

■ Excessive shrinkage is related to the thermal expansion<br />

coefficient of the media and can be minimized by fully cooling<br />

specimens under pressure in the mounting press. To minimize<br />

shrinkage, the specimen should be cooled to room<br />

temperature be<strong>for</strong>e removal from the mounting press.<br />

Looking to Control the Mounting Pressures of Everyday Sample Preparation?<br />

Let Buehler help. Our SimpliMet® Family of Mounting Presses offer:<br />

• Easy-to-use hot compression mounting equipment<br />

• Manual or semi-automatic operation<br />

• Simple analog controls or membrane keypads with LCD display<br />

• Interchangeable 1”- 2” (25mm - 50mm) mold sizes<br />

• Duplex spacer allows two mounts in a single cycle<br />

• Quick and safe bayonet mold closure system<br />

• Automatic programmability available<br />

Buehler also offers a complete line of sample preparation equipment.<br />

From abrasive cutters to precision saws to grinder-polishers, Buehler has<br />

it all!<br />

For more in<strong>for</strong>mation, contact your local Buehler <strong>Sales</strong> Engineer or visit<br />

our website at www.buehler.com/productinfo/presses.htm<br />

We are Buehler - the science behind materials preparation and<br />

analysis!<br />

12 Effective 2011

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