Bubuk titanium dan aluminium TA7

Overview of Titanium and Aluminum TA7 Powder

TA7 belongs to the titanium-aluminide intermetallic alloy system combining the lightweight properties of aluminum with the strength and corrosion resistance of titanium. The near-equiatomic ratio of Ti and Al provides an excellent balance of properties for elevated temperature applications.

Key characteristics of TA7 powder include:

• Kekuatan spesifik yang sangat tinggi (rasio kekuatan-terhadap-berat)
• Excellent high temperature tensile and creep strength
• Low density compared to nickel or steel alloys
• Good corrosion resistance in various environments
• Available in range of particle sizes and morphologies

TA7 powder has emerged as an excellent choice for reducing weight and improving efficiency in aerospace engines and airframes operating at high temperatures.

Chemical Composition of TA7 Powder

TA7 powder has the following nominal composition:

unsur	Berat %
Titanium (Ti)	Keseimbangan
Aluminium (Al)	7%
Timah (Sn)	2-5%
Zirkonium (Zr)	1-4%
Silikon (Si)	Maksimum 0,5%
Karbon (C)	0,1% maks
Oksigen (O)	0.13% max

The amount of tin and zirconium can be varied to optimize the high temperature mechanical properties. Impurity levels of Si, C, O are minimized.

Properties of TA7 Powder

Key properties of TA7 powder include:

Property	Nilai
Kepadatan	3,7-4,0 g/cm3
Titik Leleh	1460¡«C
Kekonduksian termal	6,7 W/mK
Resistivitas listrik	1.78 Ã×´Î.cm
Modulus Young	110 GPa
Rasio Poisson	0.32
Kekuatan Tarik	800 MPa
Kekuatan mulur	760 MPa
Pemanjangan	1-2%
Resistensi Merayap	190 MPa at 700¡«C

 

The properties like high strength, low density, oxidation resistance and thermal stability make TA7 suitable for the most demanding elevated temperature applications.

Production Method for TA7 Powder

TA7 powder can be produced via methods like:

• Atomize Gas?- High pressure inert gas used to atomize molten TA7 alloy resulting in spherical powder ideal for AM.
• Proses Elektroda Berputar PlasmaDisintegrasi sentrifugal dari aliran logam cair yang berputar cepat menghasilkan serbuk berbentuk bola.
• Mechanical Alloying?- High energy ball milling of blended elemental Ti and Al powders followed by annealing.

Gas atomization provides excellent control over powder characteristics like particle size distribution, morphology, microcleanliness and flowability.

Applications of TA7 Powder

TA7 powder is commonly used in:

• pembuatan aditif?- Selective laser melting to produce complex airfoil shapes, impellers, turbine blades.
• Pencetakan Injeksi Logam?- To manufacture small, complex net-shape parts like turbocharger components needing high strength and temperature resistance.
• Lapisan Semprotan Termal?- Applied via plasma or HVOF spraying on valve surfaces, bearings, landing gear components needing wear/corrosion resistance at high temperatures.
• Metalurgi Serbuk?- Pressing and sintering to create lightweight, high-strength structural parts for aerospace applications.

Specifications of TA7 Powder

TA7 powder is available under various size ranges, shapes and purity levels:

• Besaran partikel:Dari 15-45 m untuk metode AM, hingga 100 m untuk proses semprotan termal.
• Morfologi:Bentuk bubuk yang hampir bulat memberikan aliran dan kepadatan kemasan yang optimal.
• Kemurnian:?From commercial purity to ultra high purity levels based on impurity limits and process requirements.
• Kandungan Oksigen:Tingkat dipertahankan di bawah 2000 ppm untuk sebagian besar aplikasi.
• Laju Aliran:Serbuk yang disesuaikan untuk laju aliran yang sangat baik di atas 25 s/50 g.

Global Suppliers of TA7 Powder

Some of the major global suppliers of TA7 powder include:

• AP&C (Kanada)
• TLS Technik (Jerman)
• Sandvik Osprey (UK)
• Tekna (Kanada)
• Butiran ECKA (Jerman)
• Metal Technology (UK)

These companies produce various grades of TA7 powder tailored for additive manufacturing, thermal spray, powder metallurgy and other high temperature applications.

Pricing of TA7 Powder

TA7 powder is priced higher than steels and nickel alloys:

• Kuantitas- $100-150 per kg untuk pesanan dalam jumlah besar di atas 500 kg. Jumlah yang lebih kecil dihargai jauh lebih tinggi.
• KualitasKemurnian tinggi, bubuk bulat yang diproduksi di bawah kondisi yang dikontrol dengan ketat menggunakan proses yang canggih menuntut harga premium.
• PemasokPemasok global utama menawarkan keunggulan biaya dibandingkan dengan produsen yang lebih kecil karena volume produksi yang lebih tinggi.
• GeografiHarga bervariasi di seluruh wilayah dengan Eropa dan Amerika Utara merupakan pasar dengan harga yang lebih tinggi dibandingkan dengan Asia.

For critical applications, buyers should focus on powder quality rather than lowest cost while sourcing TA7 powder.

Storage and Handling of TA7 Powder

TA7 powder requires careful storage and handling:

• Sebaiknya disimpan dalam wadah tertutup di bawah gas inert seperti argon untuk mencegah oksidasi.
• Hindari penumpukan serbuk halus untuk meminimalkan risiko ledakan debu.
• Gunakan APD, ventilasi, grounding, dan praktik keselamatan yang tepat selama penanganan bubuk.
• Cegah kontak antara bubuk dan sumber penyalaan karena bahaya mudah terbakar.
• Ikuti panduan keselamatan yang berlaku dari SDS pemasok.

Harus berhati-hati saat menangani bubuk paduan yang sangat reaktif ini.

Inspection and Testing of TA7 Powder

Key quality control tests performed on TA7 powder:

• Analisis kimia menggunakan ICP-OES atau XRF untuk memastikan komposisi memenuhi spesifikasi.
• Distribusi ukuran partikel menggunakan difraksi laser sesuai standar ASTM B822.
• Analisis morfologi melalui pencitraan SEM.
• Pengukuran laju aliran serbuk menggunakan pengukur aliran Hall sesuai standar ASTM B213.
• Pengukuran densitas dengan piknometri helium.
• Analisis pengotor melalui fusi gas inert atau ICP-MS.
• Karakterisasi mikrostruktur dengan difraksi sinar-X.

Pengujian menyeluruh memastikan konsistensi batch dan kualitas bubuk untuk aplikasi yang dimaksudkan.

Comparison Between TA7 and Inconel 718 Powders

TA7 and Inconel 718 powders compared:

Parameter	TA7	Inconel 718
Kepadatan	3,7-4,0 g/cm3	8,2 g/cm3
Kekuatan temperatur tinggi	Dapat dibandingkan	Dapat dibandingkan
Ketahanan oksidasi	Lebih baik	Baik
Biaya	Lebih Tinggi	Lebih rendah
Kepraktisan	Kurang	Luar biasa
APLIKASI	Komponens Dirgantara	Aerosangkasa, otomotif
Ketersediaan	Rendah	Tersedia dengan mudah

 

TA7 offers weight savings over Inconel 718. But workability is poor and availability is lower for titanium aluminide powder.

TA7 Powder FAQs

Q: How is TA7 powder produced?

A: TA7 powder is commercially produced using gas atomization, plasma rotating electrode process, and mechanical alloying followed by annealing. Gas atomization offers the best control of powder characteristics.

Q: What are the main applications of TA7 powder?

A: The major applications of TA7 powder include additive manufacturing, thermal spray coatings, metal injection molding, and powder metallurgy to manufacture lightweight structural parts needing high temperature capability.

Q: What is the typical TA7 powder size used for selective laser melting?

A: For SLM process, the ideal TA7 powder size range is 15-45 microns with spherical morphology and good powder flow and packing density.

Q: Does TA7 powder require special handling precautions?

J: Ya, bahan ini sangat reaktif dan memerlukan penanganan yang hati-hati di bawah atmosfer lembam dengan menggunakan ventilasi yang tepat, pengardean, APD untuk mencegah bahaya kebakaran atau ledakan.

Q: Where can I purchase TA7 powder suitable for aerospace parts?

A: For aerospace applications needing lightweight and high strength, TA7 powder can be purchased from leading manufacturers including AP&C, TLS Technik, Sandvik Osprey, and Tekna.