Compound Particles and Product Manufactured Therefrom
A compound particle and a product manufactured from the compound particles are provided to solve a problem of a rough surface of a product made by additive manufacturing technology. The compound particle has a metal core and a ceramic shell wrapping the metal core. A melting point of the ceramic shell is higher than a melting point of the metal core.
The present disclosure generally relates to a particle structure and, more particularly, to compound particles adapted for additive manufacturing technology and the product manufactured from the compound particles.
2. Description of the Related ArtConventional objects are generally manufactured through molding, casting, grinding, etc. Take turbine rotor as an example, the surface roughness of conventional precision casting turbine rotor shall be larger than 1 μmRa and the yield rate is thus low. In addition, the exterior of the product is complicated for making a wax mold, the processing time is long, and the cost is also high. Particularly, it is commonly seen that the product has cavities and defects making subsequent processing, such as the polishing of the blades, difficult.
With the advance of science and technology, technologies such as sintering and additive manufacturing are further developed. For example, power bed fusion (PBF) technology adopts powders layer-by-layer to form the exterior of an object at different heights. Afterwards, it uses a heat source (such as an electron beam, a laser beam, etc.) to melt the powders in the same layer be melted and bound together. Thus, various objects such as precision components can be efficiently and effectively “manufactured”.
However, as shown in
Therefore, it is necessary to improve the disadvantages of the conventional bulk material to meet the actual need and to improve the applicability.
SUMMARY OF THE INVENTIONTo solve the problem, the disclosure provides a compound particle which can increase the threshold energy value to delay the occurrence of thermo-capillarity and to enhance the capillary oscillation impedance.
The disclosure provides a product manufactured from compound particles with decreased surface roughness of the product.
The disclosure provides a compound particle which may have a metal core and a ceramic shell wrapping the metal core. A melting point of the ceramic shell may be higher than a melting point of the metal shell.
The disclosure also provides a product manufactured from the compound particles.
The metal core may have a material selected from titanium, stainless steel, aluminum alloy, titanium alloy, cobalt-chromium alloy, and nickel-based alloy. The metal core may have a diameter between 30 and 120 mm. The ceramic shell may have a material selected from tricalcium phosphate, hydroxyapatite, alumina, silicon carbide, silicon dioxide, titanium dioxide, and zirconia. The ceramic shell may have a thickness between 50 and 100 nm. Accordingly, the compound particle may be adapted for conventional powder bed fusion technology, such as being used for powder bed fusion of 3D printing, to reduce the surface roughness of the product.
The melting point of the metal core may be between 660 and 1700° C., where the melting point of the ceramic shell may be higher than 1700° C. but not higher than 2500° C. Alternatively, the melting point of the ceramic shell may be between 1000 and 2500° C., where the melting point of the metal core may not be lower than 660° C. but may be lower than 1000° C.
The compound particle and the product manufactured therefrom may have the ceramic shell wrapping the metal core with the melting point of the ceramic shell higher than the melting point of the metal core. Accordingly, when the compound particle is used in additive manufacturing (such as power bed fusion) technology, the threshold energy value and the viscosity may be increased to delay the occurrence of thermo-capillarity, to enhance the capillary oscillation impedance and to increase the efficiency of the capillary oscillation impedance. The surface roughness of the product manufactured by additive manufacturing technology may be effectively improved. The compound particle provides an effect of “reducing the surface roughness of the product” and is adapted for additive manufacturing product to increase the industrial value.
The present disclosure will become more fully understood from the detailed description given hereinafter and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present disclosure, and wherein:
In the various figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the terms “inner”, “outer”, “side”, “top”, “bottom”, “front”, “rear”, “left”, “right” and similar terms are used hereinafter, it should be understood that these terms have reference only to the structure shown in the drawings as it would appear to a person viewing the drawings, and are utilized only to facilitate describing the disclosure.
DETAILED DESCRIPTION OF THE INVENTIONReferring to
In the present embodiment, the melting point of the metal core 1 may be between 660 and 1700° C., and the melting point of the ceramic shell 2 may be between 1000 and 2500° C. For example, when the melting point of the ceramic shell 2 being between 1000 and 2500° C., the melting point of the metal core 1 may not be lower than 660° C. but may be lower than 1000° C.; when the melting point of the metal core 1 being between 660 and 1700° C., the melting point of the ceramic shell 2 may be higher than 1700° C. but not higher than 2500° C., to maintain the melting point of the ceramic shell 2 higher than the melting point of the metal core 1.
Referring to
Referring to
Therefore, the above embodiment actually uses the ceramic shell to wrap the metal core due to the characteristic that the melting point of the ceramic shell 2 is higher than the melting point of the metal core 1. When being used in additive manufacturing (such as powder bed fusion) technology, the threshold energy value and the viscosity may be increased to delay the occurrence of thermo-capillarity. Accordingly, the capillary oscillation impedance may be enhanced and the efficiency of the capillary oscillation impedance may also be increased. Therefore, the surface roughness of the additive manufacturing products may be effectively improved. The present embodiment has an effect of “reducing the surface roughness of the product” and is adapted for additive manufacturing products to increase the industrial value.
Although the disclosure has been described in detail with reference to its presently preferable embodiments, it will be understood by one of ordinary skill in the art that various modifications can be made without departing from the spirit and the scope of the disclosure, as set forth in the appended claims.
Claims
1. A compound particle, comprising:
- a metal core; and
- a ceramic shell wrapping the metal core, wherein a melting point of the ceramic shell is higher than a melting point of the metal core.
2. The compound particle as claimed in claim 1, wherein the metal core comprises a material selected from titanium, stainless steel, aluminum alloy, titanium alloy, cobalt-chromium alloy, and nickel-based alloy.
3. The compound particle as claimed in claim 1, wherein the metal core has a diameter between 30 and 120 μm.
4. The compound particle as claimed in claim 1, wherein the ceramic shell comprises a material selected from tricalcium phosphate, hydroxyapatite, alumina, silicon carbide, silicon dioxide, titanium dioxide, and zirconia.
5. The compound particle as claimed in claim 1, wherein the ceramic shell has a thickness between 50 and 100 nm.
6. The compound particle as claimed in claim 1, wherein the melting point of the metal core is between 660 and 1700° C.
7. The compound particle as claimed in claim 6, wherein the melting point of the ceramic shell is higher than 1700° C. but not higher than 2500° C.
8. The compound particle as claimed in claim 1, wherein the melting point of the ceramic shell is between 1000 and 2500° C.
9. The compound particle as claimed in claim 8, wherein the melting point of the metal core is not lower than 660° C. but lower than 1000° C.
10. A product manufactured from compound particles, wherein the product is manufactured from the compound particles as claimed in claim
Type: Application
Filed: Dec 22, 2016
Publication Date: Jun 28, 2018
Inventors: Meng-Hsiu Tsai (Kaohsiung City), Fu-Chuan Hsu (Kaohsiung City), Ying-Cheng Lu (Kaohsiung City), Sebastien Husson (Kaohsiung City)
Application Number: 15/387,784