Process
What are the two types of Atomization
Water and Gas
Whats two property of a Cermet
High temperature resistance
Hardness
Plastic deformation
Low wear and corrosion properties
Resistant to high velocity impacts
Light weight
Biocompatible
Moderate thermal conductivity
What is a Homogenous Mixture
combination of two or more substances
The two processes that happen to the material in a ball mill
Cold welding, and fracturing
Define Metallurgy
he branch of science and technology concerned with the properties of metals and their production and purification
Atomization produces what shape particle
Spherical
What is Sintering
High-temperature process that bonds ceramic and metal powders via atomic diffusion, forming dense, durable materials.
Name two gases used in Gas Atomization
Argon, Nitrogen, Air, Helium
What is SLM
Selective laser melting
Laser that melt powder layer by layer to form complex parts
Define Ceramics
A material that is neither metallic nor organic.
Combination of metallic elements and non metallic elements.
The four steps of Metallurgy Process
Powder Production
Mixing and Blending
Compacting
Sintering
What is Compacting
The process of pressing metal/ceramic powders into a desired shape
Name a type of a Cermet
Oxide- based cermet Ex. Nickel Aluminate
Carbide- based cermet, tungsten carbide-cobalt.
Nitride- based cermet, titanium nitride with metal binders.
What is EBM
Electron beam melting
Electron beam melt powder layer by layer to form complex parts (3D printer)
Define cermet
A composite material consisting of ceramic (cer) and metallic (met) materials
Name the four Powder Production Processes
Mechanical Alloying
Gas or Water Atomization
Electrolysis
Chemical Reduction
What is Mixing and Blending
The process of combining different metal and ceramic powders to achieve a uniform distribution of materials prior to compacting.
1 type of Sintering
Solid-State Sintering: No melting; particles bond through diffusion.
Liquid-Phase Sintering: Metal binder melts, enhancing densification.
Hot Isostatic Pressing (HIP): Uniform pressure improves density.
Spark Plasma Sintering (SPS): Fast sintering using electrical current.
What is Smelting
extraction of metal by heating and melting with the use a reducing agent to break the bonds
Often add carbon or hydrogen
Define Electrolysis
-Use of electrical power to separate metals from their ores
-Current is passed through the molten or dissolved electrolyte
Why was Mechanical Alloying originally invented?
produce oxide-dispersion-strengthened Ni- and Fe-based superalloys
Uniaxial Pressing: Pressure is applied from one direction; used for simple shapes.
Cold Isostatic Pressing (CIP): Pressure is applied uniformly from all directions, ideal for complex geometries.
Hot Pressing: Combines pressing with heating to enhance densification.
Tumbling: Powders are mixed in a rotating drum; suitable for bulk materials.
Vibratory Mixing: Uses vibration to promote powder movement and mixing.
High-Energy Milling: Involves mechanical forces to break down particles and achieve a homogeneous mix; often used for fine powders.
During Chemical Reduction, Iron oxide with carbon produces what
Fe2O3 +3CO --->
2Fe+3CO
Define Hall-Heroult
process of aluminum pulled for Bauxite ore