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Spray coating processing SPRAY PROCESSING
Artificial hip joint surface sprayed with titanium (Ti); artificial hip joint sprayed with hydroxyapatite coating.
1. Plasma arc spraying of Ti and HA coatings onto artificial joint surfaces: Plasma-sprayed titanium (Ti) and hydroxyapatite (HA) coatings deposited on Ti or its alloy substrates have already been clinically applied. 2. The porous coating used in biological hip joints is prepared through appropriate processes using spherical titanium beads, titanium powder, calcium phosphate ceramics, and other materials; the preparation method for this porous coating employs plasma spraying.
人工髋关节表面喷涂
人工髋关节涂层
人工髋关节表面喷钛(Ti)
人工髋关节喷羟基磷灰石(HA)涂层
髋关节假体喷钛等离子喷涂生产线
人工关节喷钛羟基磷灰石涂层等离子喷涂生产线交钥匙工程
Product Description
Plasma-sprayed titanium Introduction to the Application of Titanium (Ti) and Hydroxyapatite (HA) Coatings in Artificial Joints
Plasma arc spraying of Ti and HA coatings onto artificial joint surfaces—plasma-sprayed titanium (Ti) and hydroxyapatite (HA) coatings deposited on Ti or its alloy substrates have already been clinically applied.
Currently, biological hip prostheses coated with hydroxyapatite are widely used in clinical practice. Hydroxyapatite is a calcium phosphate salt with excellent biocompatibility and bioactivity. Through appropriate surface treatment, it can form a thin coating on metal surfaces. This treatment method significantly enhances osseointegration of press-fit prostheses, providing bony fixation that lasts until bone ingrowth occurs into the porous surface of the prosthesis. Non-cemented prostheses with hydroxyapatite coatings promote early bone ingrowth following implantation, allowing for early weight-bearing. They offer both strong mechanical fixation and durable biological fixation, with no complications reported in the long term.
Ti and HA coatings were prepared on artificial joint substrates using plasma arc spraying. The bonding strength of the plasma-sprayed (VPS) Ti coating can reach 60 MPa. The plasma-sprayed HA coating contains some amorphous phases and new phases, such as CaO and Ca3(PO4)2. The formation of the amorphous phases is mainly attributed to the rapid quenching of molten particles when they are sprayed onto the substrate at high temperatures; whereas the new phases like CaO and Ca3(PO4)2 originate from the decomposition of HA during the spraying process. Plasma spraying... The amorphous phase and new phases in the HA coating were significantly reduced, primarily due to the lower flame temperature during VPS spraying. Crystallinity measurements showed that the crystallinity of the APS HA coating was only 42%, whereas the crystallinity of the VPS HA coating exceeded 60%, meeting the clinical requirements for coating crystallinity in implant applications. The actual components of plasma-sprayed Ti-HA-coated artificial hip joints are shown in the figure below.
Approximately sprayed artificial hip implants 7,000 items
HA-based composite coatings were prepared on a Ti-6Al-4V alloy substrate using plasma arc spraying technology. Composite coatings such as HA/Ti, HA/TiO2, and HA/ZrO2 were fabricated, which can effectively enhance the bonding between the coating and the substrate.
The combined strength analysis indicates that, in... The incorporation of components such as metals or ceramics into HA coatings can improve the coating's bonding performance. Taking the HA/ZrO2 composite coating as an example, the bonding strength of the composite coating containing ωZrO2 = 60% is approximately twice that of a pure HA coating. This enhancement in bonding strength is primarily attributed to the fact that the addition of dopants alleviates the mismatch in thermal expansion coefficients between the coating and the substrate, thereby reducing the concentration of residual thermal stresses at the interface caused by this mismatch. Additionally, the higher intrinsic bonding strength of the dopants themselves is another important factor contributing to the improved bonding strength of the composite coating.
An artificial total hip prosthesis typically includes: a femoral stem, a femoral head, an acetabular liner, and an acetabular cup; the femoral head is usually... The acetabular liner is typically made of CoCrMo or high-performance ceramic; the acetabular cup liner is usually made of ultra-high-molecular-weight polyethylene, highly cross-linked ultra-high-molecular-weight polyethylene, or high-performance ceramic. The biological femoral stem generally uses a Ti6Al4V alloy with a lower elastic modulus and excellent biocompatibility as its base material, and the stem body is coated with a porous layer. The biological acetabular cup typically uses a Ti6Al4V alloy or pure titanium as its base material, with a porous coating applied to its outer surface.
The porous coating in biological hip joints is prepared through a specific process using spherical titanium beads, titanium powder, calcium phosphate ceramics, and other materials. The preparation method for the porous coating involves plasma spraying.
Plasma Surface Treatment Process for Coated Titanium Alloy Biofixation Artificial Hip Joints:
·The implant surface is sandblasted to create microscopic pores, increasing surface roughness and enhancing long-term fixation.
·On the basis of sandblasting, the implant is further coated with HA. Thanks to HA’s osteoconductive properties, this approach achieves excellent long-term fixation.
·The prosthesis coating is applied using vacuum plasma spraying technology, achieving a material adhesion strength that significantly exceeds that attainable with conventional spraying processes.
·Exquisite craftsmanship ensures perfect coating thickness and uniformity.
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Spraying equipment SPRAY EQUIPMENT
Artificial hip joint surface sprayed with titanium (Ti); artificial hip joint sprayed with hydroxyapatite coating.
1. Plasma arc spraying of Ti and HA coatings onto artificial joint surfaces: Plasma-sprayed titanium (Ti) and hydroxyapatite (HA) coatings deposited on Ti or its alloy substrates have already been clinically applied. 2. The porous coating used in biological hip joints is prepared through appropriate processes using spherical titanium beads, titanium powder, calcium phosphate ceramics, and other materials; the preparation method for this porous coating employs plasma spraying.
人工髋关节表面喷涂
人工髋关节涂层
人工髋关节表面喷钛(Ti)
人工髋关节喷羟基磷灰石(HA)涂层
髋关节假体喷钛等离子喷涂生产线
人工关节喷钛羟基磷灰石涂层等离子喷涂生产线交钥匙工程
Product Description
Plasma-sprayed titanium Introduction to the Application of Titanium (Ti) and Hydroxyapatite (HA) Coatings in Artificial Joints
Plasma arc spraying of Ti and HA coatings onto artificial joint surfaces—plasma-sprayed titanium (Ti) and hydroxyapatite (HA) coatings deposited on Ti or its alloy substrates have already been clinically applied.
Currently, biological hip prostheses coated with hydroxyapatite are widely used in clinical practice. Hydroxyapatite is a calcium phosphate salt with excellent biocompatibility and bioactivity. Through appropriate surface treatment, it can form a thin coating on metal surfaces. This treatment method significantly enhances osseointegration of press-fit prostheses, providing bony fixation that lasts until bone ingrowth occurs into the porous surface of the prosthesis. Non-cemented prostheses with hydroxyapatite coatings promote early bone ingrowth following implantation, allowing for early weight-bearing. They offer both strong mechanical fixation and durable biological fixation, with no complications reported in the long term.
Ti and HA coatings were prepared on artificial joint substrates using plasma arc spraying. The bonding strength of the plasma-sprayed (VPS) Ti coating can reach 60 MPa. The plasma-sprayed HA coating contains some amorphous phases and new phases, such as CaO and Ca3(PO4)2. The formation of the amorphous phases is mainly attributed to the rapid quenching of molten particles when they are sprayed onto the substrate at high temperatures; whereas the new phases like CaO and Ca3(PO4)2 originate from the decomposition of HA during the spraying process. Plasma spraying... The amorphous phase and new phases in the HA coating were significantly reduced, primarily due to the lower flame temperature during VPS spraying. Crystallinity measurements showed that the crystallinity of the APS HA coating was only 42%, whereas the crystallinity of the VPS HA coating exceeded 60%, meeting the clinical requirements for coating crystallinity in implant applications. The actual components of plasma-sprayed Ti-HA-coated artificial hip joints are shown in the figure below.
Approximately sprayed artificial hip implants 7,000 items
HA-based composite coatings were prepared on a Ti-6Al-4V alloy substrate using plasma arc spraying technology. Composite coatings such as HA/Ti, HA/TiO2, and HA/ZrO2 were fabricated, which can effectively enhance the bonding between the coating and the substrate.
The combined strength analysis indicates that, in... The incorporation of components such as metals or ceramics into HA coatings can improve the coating's bonding performance. Taking the HA/ZrO2 composite coating as an example, the bonding strength of the composite coating containing ωZrO2 = 60% is approximately twice that of a pure HA coating. This enhancement in bonding strength is primarily attributed to the fact that the addition of dopants alleviates the mismatch in thermal expansion coefficients between the coating and the substrate, thereby reducing the concentration of residual thermal stresses at the interface caused by this mismatch. Additionally, the higher intrinsic bonding strength of the dopants themselves is another important factor contributing to the improved bonding strength of the composite coating.
An artificial total hip prosthesis typically includes: a femoral stem, a femoral head, an acetabular liner, and an acetabular cup; the femoral head is usually... The acetabular liner is typically made of CoCrMo or high-performance ceramic; the acetabular cup liner is usually made of ultra-high-molecular-weight polyethylene, highly cross-linked ultra-high-molecular-weight polyethylene, or high-performance ceramic. The biological femoral stem generally uses a Ti6Al4V alloy with a lower elastic modulus and excellent biocompatibility as its base material, and the stem body is coated with a porous layer. The biological acetabular cup typically uses a Ti6Al4V alloy or pure titanium as its base material, with a porous coating applied to its outer surface.
The porous coating in biological hip joints is prepared through a specific process using spherical titanium beads, titanium powder, calcium phosphate ceramics, and other materials. The preparation method for the porous coating involves plasma spraying.
Plasma Surface Treatment Process for Coated Titanium Alloy Biofixation Artificial Hip Joints:
·The implant surface is sandblasted to create microscopic pores, increasing surface roughness and enhancing long-term fixation.
·On the basis of sandblasting, the implant is further coated with HA. Thanks to HA’s osteoconductive properties, this approach achieves excellent long-term fixation.
·The prosthesis coating is applied using vacuum plasma spraying technology, achieving a material adhesion strength that significantly exceeds that attainable with conventional spraying processes.
·Exquisite craftsmanship ensures perfect coating thickness and uniformity.
Prev: None
Next: Plasma-titanium and hydroxyapatite spraying production line
Online Quotation
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