29 Questions
Why does the high hardness of ceramic materials complicate the preparation of the starting powder?
It causes severe wear and damage during milling.
Which shaping method involves forcing the material through a die to create a specific shape?
Extrusion
Which method of powder processing involves the use of organic additives and dispersing mechanisms?
Spray dryer
What is the purpose of isostatic pressing in powder processing?
To apply pressure from all directions
Why does brittleness facilitate the milling process in ceramic materials?
It helps break the material into smaller particles.
Which milling method involves particles being ground by colliding with each other in a rotating drum?
Scouring mill
What is a key consideration for the rheology of the suspension in direct ink writing (DWI / Robocasting)?
Flowing under low pressure
What is the purpose of the ink preparation in direct ink writing?
To have low viscosity at low shear rates
In ceramic 3D printing using DWI/Robocasting, what is followed after the dry and burn-out stage?
Sintering
What is the primary method employed in three-dimensional printing (3DP) for ceramics?
Direct ink writing (Robocasting)
What characterizes the process of powder-based three-dimensional printing (3DP) according to the text?
Computer-controlled targeted spinning of powder
Which of the following techniques is NOT typically classified as a powder-based method in additive manufacturing?
Fused deposition modeling (FDM)
Which additive manufacturing technique uses a resin-based Slurry for power source?
Digital light processing (DLP)
In which technique is Binder used during the Three-dimensional printing (3DP) process?
Laminated object manufacturing (LOM)
Which additive manufacturing method utilizes Powder fusion in the Laser-based process of sintering/debinding?
Selective laser melting (SLM)
Which technique involves Sheet lamination as part of its manufacturing process?
Solid-based Laminated object manufacturing (LOM)
In which method is Thermal energy used during the Debinding/sintering phase described as Medium speed based?
Fused deposition modeling (FDM)
What is the purpose of adding binders to the sand (SiO2) and water mixture during injection molding?
To provide mechanical stability and enhance particle interactions
What is the significance of controlling the rheology of a ceramic suspension in injection molding?
It allows for the production of complex shapes
Which statement best describes the advantage of injection molding over traditional ceramic processing methods?
It enables the production of components with relatively complex shapes
What is the purpose of the thermal debinding step in the injection molding process described in the text?
To remove residual binders and additives from the molded component
What is a potential challenge associated with injection molding of ceramics?
Accounting for shrinkage during sintering
Which statement best describes the future prospects of additive manufacturing of ceramics, according to the text?
It has a promising future, but further research and development are needed
What is the crucial factor in obtaining final products with good quality in the SLA process?
The homogeneous dispersion of ceramic particles and long-time stability of the suspension
Which factor(s) can make ceramic particles difficult to process using the SLA method?
Greater light absorption and refraction by the ceramic particles
What is the typical activation mechanism for the light-activated polymerization process in SLA?
Scanning of the suspension surface with UV light
Which of the following factors affect the SLA process significantly?
Viscosity, solids content, and light absorption by particles
What is the typical resolution range achievable with the SLA process?
Micrometer range
Which of the following advanced ceramic parts can be fabricated using SLA?
Porous bioceramic scaffolds, photonic crystals, and hollow turbine blades
Test your knowledge on methods of powder processing in ceramics, including wet processing, moist processing, and dry processing. Learn about equipment such as drum mills, agitator ball mills, and vertical roller mills, as well as aspects like particle shape and size distribution.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
