Journals / Academic Platform Journal of Engineering and Smart Systems / 2026 / Volume: 7 Issue: 1

Effects of TiB2 and La2O3 Particle Reinforcements on the Tungsten Matrix Composites Fabricated by Mechanical Alloying and Activated Sintering

TiB2 ve La2O3 Partikül Takviyelerinin Mekanik Alaşımlama ve Aktifleştirilmiş Sinterleme ile Üretilen Volfram Matrisli Kompozitler Üzerindeki Etkisinin İncelenmesi

Duygu Ağaoğulları(İSTANBUL TEKNİK ÜNİVERSİTESİ, KİMYA-METALURJİ FAKÜLTESİ)0000-0002-0623-5586
Özge Balcı(KOÇ ÜNİVERSİTESİ, FEN FAKÜLTESİ, KİMYA BÖLÜMÜ)0000-0001-6756-3180
Hasan Gökçe(İstanbul Teknik Üniversitesi, İstanbul, Türkiye)0000-0003-3672-4919
Didem Ovalı(İSTANBUL TEKNİK ÜNİVERSİTESİ, KİMYA-METALURJİ FAKÜLTESİ)0000-0002-7934-6535
M. Lütfi Öveçoğlu(İSTANBUL TEKNİK ÜNİVERSİTESİ, KİMYA-METALURJİ FAKÜLTESİ)0000-0002-1536-4961
Pages
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Publication Date
2019-01-15
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The highest relative density and microhardness values were obtained as % 92.14 and 6.27 ± 1.54 GPa, respectively, for the W1Ni-3 wt.% TiB 2 -1 wt.% La 2 O 3 composite after mechanical alloying for 6 h, cold pressing and sintering.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, 1 wt.% Ni activated tungsten matrix composites (W1Ni) reinforced with different amounts of TiB 2 and La 2 O 3 particles were fabricated using mechanical alloying, cold pressing and pressureless sintering methods.
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Key Findings & Data:In this scope, different amounts of TiB 2 (3 and 4 wt.%) and La 2 O 3 (0.5 and 1 wt.%) particles were incorporated into W1Ni matrix and mechanical alloying process was conducted for different durations (6 and 12 h).
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Conclusion & Impact:The highest relative density and microhardness values were obtained as % 92.14 and 6.27 ± 1.54 GPa, respectively, for the W1Ni-3 wt.% TiB 2 -1 wt.% La 2 O 3 composite after mechanical alloying for 6 h, cold pressing and sintering.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Tungsten matrix composites · Titanium diboride · Lanthanum oxide

Abstract

In this study, 1 wt.% Ni activated tungsten matrix composites (W1Ni) reinforced with different amounts of TiB 2 and La 2 O 3 particles were fabricated using mechanical alloying, cold pressing and pressureless sintering methods. In this scope, different amounts of TiB 2 (3 and 4 wt.%) and La 2 O 3 (0.5 and 1 wt.%) particles were incorporated into W1Ni matrix and mechanical alloying process was conducted for different durations (6 and 12 h). As-blended and mechanically alloyed powders were cold pressed using a uniaxial hydraulic press and green bodies were sintered under Ar/H 2 gas flowing condition. The physical, microstructural and hardness properties of cold pressed and sintered W1Ni composites reinforced with different amounts of TiB 2 and La 2 O 3 particles were investigated. The addition of TiB 2 and La 2 O 3 reinforcements led an increase in the density and/or microhardness values of the composites. It was observed that mechanical alloying time had a significant effect on the properties and microstructure of the sintered products. The combined usage of 3 or 4 wt.% TiB 2 with 1 wt.% La 2 O 3 reinforcement resulted in the formation of W 2 B phase in addition to the dominant W phase after sintering. The highest relative density and microhardness values were obtained as % 92.14 and 6.27 ± 1.54 GPa, respectively, for the W1Ni-3 wt.% TiB 2 -1 wt.% La 2 O 3 composite after mechanical alloying for 6 h, cold pressing and sintering.

Özet

Bu çalışmada, farklı miktarlarda TiB 2 ve La 2 O 3 partikülleri ile takviye edilmiş ve ağırlıkça % 1 Ni ile aktifleştirilmiş volfram matrisli (W1Ni) kompozitler mekanik alaşımlama, soğuk presleme ve basınçsız sinterleme yöntemleri kullanılarak üretilmiştir. Bu kapsamda, farklı miktarlardaki TiB 2 (ağ.% 3 ve 4) ve La 2 O 3 (ağ.% 0,5 ve 1) partikülleri W1Ni matris içerisine katkılandırılmış ve farklı sürelerde (6 ve 12 sa) mekanik alaşımlama prosesi uygulanmıştır. Karıştırılmış ve mekanik alaşımlanmış tozlar tek eksenli hidrolik pres kullanılarak soğuk preslenmiş ve pekiştirilen bünyeler Ar/H 2 gaz akış şartlarında sinterlenmiştir. Farklı miktarlardaki TiB 2 ve La 2 O 3 partikülleri ile takviye edilmiş, preslenmiş ve sinterlenmiş W1Ni matrisli kompozitlerin fiziksel, mikroyapısal ve mikrosertlik özellikleri incelenmiştir. TiB 2 veya La 2 O 3 katkılarının, numunelerin yoğunluk ve/veya mikrosertlik değerlerinde artışa neden olduğu saptanmıştır. Mekanik alaşımlama süresinin, sinter ürün özelliklerinde ve mikroyapıda önemli bir etkisinin olduğu gözlemlenmiştir. Ağ.% 3 veya 4 miktarındaki TiB 2 ve ağ.% 1 miktarındaki La 2 O 3 katkılarının birlikte kullanımı, sinterlenme sonrasında, baskın W fazına ek olarak W 2 B faz oluşumuna neden olmuştur. En yüksek rölatif yoğunluk ve mikrosertlik değerleri sırasıyla % 92,14 ve 6,27 ± 1,54 GPa olup, 6 sa mekanik alaşımlama uygulanmış, preslenmiş ve sinterlenmiş olan W1Ni-ağ.% 3 TiB 2 -ağ.%1 La 2 O 3 kompozisyonu için elde edilmiştir.

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Cite This Article

Ağaoğulları, D., Balcı, Ö., Gökçe, H., Ovalı, D., Öveçoğlu, M. L. (2019). Effects of TiB2 and La2O3 Particle Reinforcements on the Tungsten Matrix Composites Fabricated by Mechanical Alloying and Activated Sintering. Academic Platform Journal of Engineering and Smart Systems, Volume: 7 Issue: 1. https://doi.org/10.21541/apjes.410375

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