How to precision process microcrystalline glass ceramic materials

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Microcrystalline glass ceramic is an advanced composite material that combines the processability of glass with the high strength and hardness of ceramics. It is widely used in fields such as aerospace, electronics, biomedical, and energy. However, due to its high hardness and brittleness, precision machining is difficult and requires the use of special processing techniques and equipment. 、

1、 Preparation before processing

1. Material selection and pretreatment:
   -The composition and crystal structure of microcrystalline glass ceramics have a significant impact on their processing properties. Usually, suitable materials need to be selected based on specific applications.
   -Before processing, the material needs to undergo heat treatment to reduce hardness and improve processing performance.
   -For microcrystalline glass ceramics that require further processing, most of the processing is usually completed before crystallization, as the material hardness is lower at this time.
2. Equipment and tool preparation:
   -High precision CNC machine tools, precision measuring tools, and specialized machining tools are required.
   -Common tool materials include high-speed steel and hard alloy steel.

2、 Main processing techniques

1. Machining:
   -Cutting speed: Use a low cutting speed (such as over 100 revolutions per minute) to prevent small cracks from forming on the ceramic surface.
   -Feed speed: controlled between 0.05-0.13mm/r to ensure machining accuracy.
   -Tool selection: Hard alloy steel cutting heads provide better results.
   -Cooling method: Water cooling is used to prevent thermal damage.
2. Milling:
   -Operating speed: Use hard alloy tools to operate at a slow speed of 50-60rpm.
   -Feed rate and cutting depth: The feed rate is 0.03-0.4mm/r, and the cutting depth is not greater than 3mm.
   -Milling cutter selection: For smaller milling parts, a milling cutter with two chip grooves has better performance than a milling cutter with four chip grooves.
3. Drilling technology:
   -Small hole pre drilling: When drilling larger holes, first drill a small hole of about 1.5mm and drill a conical surface to prevent the surrounding area from collapsing when drilling through.
   -Bit selection: high-speed steel, carbide bit or carbide Fried Dough Twists bit can be used.
4. Grinding processing:
   -Grinding wheel selection: Use diamond grinding wheels for grinding processing to maintain the precise shape of the product and have a long service life.
   -Cooling method: Cooling water is used during the grinding process to prevent material damage from heat.
5. Polishing technology:
   -Polishing powder selection: Use alumina or ceria polishing powder.
   -Polishing process: Fine machining on a thin adhesive cloth with a thickness of 6mm for about 15 minutes, with a surface finish of up to 0.5 μ m.

3、 Processing after processing

1. Heat treatment:
   -Processed microcrystalline glass ceramics usually require heat treatment to eliminate processing stress and improve material strength and toughness.
   -The heat treatment process includes two stages: nucleation and crystallization.
2. Quality inspection:
   -Use precision measuring tools to inspect the dimensions and surface quality of the processed components.
   -Check for defects such as cracks and scratches to ensure machining accuracy and quality.

The precision machining of microcrystalline glass ceramics is not only a technical challenge, but also an art. Through exquisite craftsmanship and advanced processing techniques, this high-performance material can be processed into various precision components, contributing to technological progress and industrial development.

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.