Compound Microscopes Look at the objective lens (3) and the stage from the side and turn the focus knob (4) so the stage moves upward. Move it up as far as it will go without letting the objective touch the coverslip. Look through the eyepiece (1) and move the focus knob until the image comes into focus.

1 Uncover the microscope, unwrap the cord, and plug it in. 2 Clean all glass surfaces with lens paper. Start with the eyepiece, then do the objectives, the substage mirror or illuminator, and end with the stage window. 3 Turn on the light (or adjust the mirror so that the light shines through the stage window).

How To Use Your First Microscope

1. Step 1: Moving Your Microscope. Carry the microscope with two hands.
2. Step 2: Microscope Lens Care. Never touch any lens with your fingers.
3. Step 3: Microscope Parts.
4. Step 4: Prepare a Slide.
5. Step 5: Insert the Slide.
6. Step 6: Set Up for Viewing.
7. Step 7: Light Control.
8. Step 8: Focus the Microscope.

To prepare the slide:

1. Place a drop of fluid in the center of the slide.
2. Position sample on liquid, using tweezers.
3. At an angle, place one side of the cover slip against the slide making contact with outer edge of the liquid drop.
4. Lower the cover slowly, avoiding air bubbles.
5. Remove excess water with the paper towel.

Proper preparation of metallographic specimens to determine microstructure and content requires that a rigid step-by-step process be followed. In sequence, the steps include sectioning, mounting, course grinding, fine grinding, polishing, etching and microscopic examination.

Mechanical preparation is a commonly used technique for preparing metallographic samples for microscopic analysis. It involves using abrasive particles in successively finer steps to strip material from the surface until achieving the desired result.

Treatment is done to prepare the sample into a form ready for analysis by specified analytical equipment. Sample preparation could involve: crushing and dissolution, chemical digestion with acid or alkali, sample extraction, sample clean up and sample pre-concentration.

To find out the reason of failure of Material. To study the constructional details of Metallurgical Microscope and observe the micro structure of the prepared specimen. Operations such as shearing produce severe cold work, which can alter the microstructure of a sample.

Between each grade the specimen is washed thoroughly with soapy water to prevent contamination from coarser grit present on the specimen surface.

Proper preparation of metallographic specimens is a key step to determine the accurate microstructure of a material and often requires sectioning, mounting, course grinding, fine grinding, polishing, etching and microscopic examination.

The purpose of mounting is to protect fragile or coated materials during preparation and to obtain perfect edge retention. Mounting is used when the protection of layers is imperative, and also it enables a safer and more convenient handling of small, sharp, or irregularly shaped specimens, for example.

Each sample is mounted by placing it in a mold (usually cylindrical in shape) and filling the mold with a suitable material that embeds the sample and holds it firmly during the grinding and polishing operations that ensue.

Phenolic- Phenolic is a common thermosetting resin used in hot mounting compounds. Thermoset phenolics form hard temperature resistance mounting compounds. Polyester – Acrylic resin systems are available for hot mounting and cold mounting. Acrylics are typically low cost systems.

Introduction  Microstructure: It is the geometric arrangement of grains and the different phases present in a material.  Grain Boundaries: It is the interface between two grains in a polycrystalline material where the crystal is disordered due to rapid change in crystallographic directions.

Hand Grinding Manual Preparation – In order to insure that the previous rough grinding damage is removed when grinding by hand, the specimen should be rotated 90 degrees and continually ground until all the scratches from the previous grinding direction are removed.

Henry Clifton Sorby

Metallography is literally the scientific study of metals and alloys, specifically their structures at the microscopic scale. Most metallic objects have a grain structure which is too small to be seen by the naked eye, but which hugely affects their mechanical, electrical and corrosion properties (and many more!)

n. The study of the structure of metals and alloys, especially by optical and electron microscopy and x-ray diffraction. met′al·log′ra·pher n. me·tal′lo·graph′ic (mə-tăl′ə-grăf′ĭk) adj.

Types of Mounting Methods

• Plate Type. Holes for mounting a caster are provided on the mounting base.
• Screw-in Type. Since a thread is provided on the stem, mount a caster by screwing the caster on the stem.
• Insertion Type(Rubber Pipe Type)
• Angle Type.
• Dedicated wrenches for mounting casters.

The clean and dry specimen is placed in a mounting cylinder in a hot mounting press, and the appropriate mounting resin is added. A temperature of around 180° C and a force of about 250 bar is applied during the embedding of the specimen.

adjective. seated or riding on a horse or other animal. serving on horseback or on some special mount, as soldiers or police. (formerly) permanently equipped with horses or vehicles for transport.

mounted means any object placed on the other object while surmounted means any object holding any other object placed on the top of its surface.

Mounted Synonyms – WordHippo Thesaurus….What is another word for mounted?

(Entry 1 of 2) transitive verb. 1 : to throw down or remove from a mount or an elevated position especially : unhorse.

: to not do what someone or something with authority tells you to do : to refuse or fail to obey rules, laws, etc.