Laser-Absorbing Ceramic Powder for Precision Shaping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current additive manufacturing methods using laser beams for ceramic materials face challenges in achieving micro-precision due to the low absorption of infrared light by ceramic particles, leading to the need for high-power lasers and subsequent distortion and lack of precision in shaping.
Innovation Solution
A powder containing inorganic compound particles coated with an organic compound having an absorption band that overlaps the wavelength of the laser beam, enhancing the absorption of the laser energy and allowing for sequential melting and solidification with improved precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-power laser beams are used to melt ceramic particles, then the ceramic material can be processed, but the laser beam is transmitted and diffused by the ceramic particles causing regions greater than the beam diameter to be molten, making micro-precision shaping difficult
Solution Approach 1:
An organic compound coating is applied to the ceramic particle surfaces to act as an intermediary that absorbs laser energy and converts it to heat, which then transfers to the ceramic particles. This mediator enables efficient energy absorption without requiring direct laser-ceramic interaction, solving the transmission and diffusion problems
Solution Approach 2:
The invention changes the optical parameters of the ceramic particles by coating them with organic compounds that have absorption bands matching the laser wavelength. This parameter change transforms the particles from being transparent to the laser to being highly absorptive, enabling precise heating and melting only at the irradiated locations
2Ease of manufacture
If ceramic particles are used for additive manufacturing with laser beams, then ceramic structures can be formed, but the laser beam is practically not absorbed by the ceramic particles requiring considerably high power lasers
Solution Approach 1:
The organic compound coating serves as a mediator that bridges the gap between the laser beam and ceramic particles. It absorbs the laser energy efficiently and transfers the heat to the ceramic particles, enabling the use of lower power lasers while maintaining manufacturability
Solution Approach 2:
By changing the surface properties of ceramic particles through organic compound coating, the optical absorption parameters are fundamentally altered. This enables the particles to absorb laser energy at much lower power levels, making the manufacturing process more accessible and cost-effective
3Temperature
If eutectic oxide ceramic material is used with laser beam irradiation, then the melting point is lowered allowing molten material with relatively low power laser, but the products still give rise to a large number of protuberances on the surface making high precision shaping unsatisfactory
Solution Approach 1:
The invention applies organic compound coatings with specific absorption characteristics to control the heating parameters. This enables precise thermal management during melting, preventing excessive heat diffusion that causes surface protuberances while maintaining the benefits of lower melting points
Solution Approach 2:
The organic compound coating acts as a thermal mediator that controls heat transfer from the laser to the ceramic particles. It enables localized heating with reduced heat diffusion, preventing the formation of surface protuberances and improving overall shaping precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the production of high-precision ceramic structures by efficiently absorbing laser energy, reducing the need for high-power lasers and minimizing heat transmission, resulting in clearer boundaries and reduced surface unevenness.
Implementation Method 1
the organic compound having an absorption band that overlaps the wavelength of the laser beam
Implementation Method 2
repeating a process of sequential melting and solidification of the powder by irradiation of a laser beam
Data Source
AI summary
A powder for ceramic shaping to be used for obtaining a structure by repeating the execution of a process of sequential melting and solidification by irradiation of a laser beam contains inorganic compound particles and an organic compound, the organic compound being provided on the surfaces of the inorganic compound particles, and the organic compound has an absorption band that overlaps the wavelength of the laser beam.