Assist. Prof. Dr. Hussein Alaa Jaber, Department of Materials Engineering / University of Technology, participated in the discussion of the PhD student (Sarah Nabil Ibrahim) in Material Science branch/Department of Applied science/ University of Technology. The title of the thesis is ( Synthesis and Characterization of Advance Ceramic Matrix Composite (CMCS)).

The discussion committee was formed of the teaching staff listed:

The department of Materials Engineering in University of Technology  awarded the master degree to graduate student Huda Satar Ali under her thesis titled “Sintering Behavior of Ceramics Containing Different Fluxing Agents”. The final defense occurred in building-C of the Department of Materials Engineering on Monday 03/15/2021. The defense committee  consist of :-  

• Dr. Aseel Basim Abdul Hussain - chair
• Assist Prof. Dr. Sarmed Imad Ibrahuim -member          
• Dr. Hamza Mustafa Kamal -member
• Dr. Saad Badri Husoon Faried - supervisor
• Assist Prof. Dr. Husain Alaa Jaber - supervisor

The thesis scientific reviewer Assist Prof. Dr. Ahmed Fadel Ali. The thesis linguistic reviewer Assist Prof. Dr. Sameer Ali Ameen- University of Technology- Mechanical Engineering Department.

Abstract:

This study includes the preparation of porcelain samples from different compositions. It also comprises the possibility of adding different melting materials, including (fluorescent candles glass waste (FLGW), borax) to porcelain material samples in different proportions as a substitute for potassium feldspar and studying its effect on the sintering behavior, microstructure, physical properties, mechanical properties and thermal conductivity of porcelain samples. The results manifested that increasing the percentage of potassium feldspar in porcelain samples led to improve physical properties, mechanical properties, and decreased thermal conductivity. The addition of flux materials caused a decrease in the sintering temperature to (1000ºC) when adding 5 wt%. of waste fluorescent candle glass and to (950ºC) when adding 5 wt.% of borax, compared to samples without addition, which required a sintering temperature of (1225ºC) to obtain the appropriate physical and mechanical properties. When increasing the proportion of flux in the porcelain samples to 10 wt%, it led to the formation of closed pores in the samples, and this resulted in to a reduction in the physical and mechanical properties of the porcelain samples.

Graduate students’ final exam for 2020- 2021 first semester at Materials Eng. Department has started on Monday, March 15^th,2021. The test was done under the direction of university president Prof. Dr. Ahmad Alghaban, Materials Engineering Department chairman assistant prof. dr. Husayn Alaa, deputy chairman of Materials Engineering Department for postgraduate affairs dr. Muhanned Najah and deputy chairman of Materials Engineering Department for departmental affairs assist. Prof. dr. Nahid Mahmood Ali with applying all precautions to avoid spread Covid- 19 as much as possible.

A master’s student “Aveen Kanaan Bower” defended her thesis entitled "Preparation of Recycle Composite (Zn – Al) Alloy Reinforced with Hybrid Nano particles" on Tuesday, March 16^th, at the conference room C/ Materials Engineering Department/University of Technology. The Committee included:

1. Professor dr. Imad Saadi Abdulkarim - as a chair.
2. Assistant Professor dr. Hanaa Arir Smeech - as a committee member.
3. Dr. Ahmad Mohdafar Hashim - as a committee member.
4. Assistant Professor dr. Niveen Jamal Abdulqader - as an adviser.
5. Assistant Professor dr. Ahmad Ameed Zainelabideen - as an adviser.

Assistant professor dr. Payman Suhba Ahmad/  Koya University reviewed and characterized the dissertation by the methods of science, whereas Assistant Professor dr. Sameer Ali Ameen / University of Technology/ Mechanical Engineering Department reviewed the dissertation linguistically to meet the style of English. Congratulations to the student on her graduation.

Abstract:

This study included the stir casting process that was used to manufacture the recycled materials of (ZA-12) composites with different weight percentages of nanoparticles and with using of aluminum scrap (AA 2024), pure Al (electrical wires) and zinc scraps. Mechanical tests results confirmed that the hardness and the compression increased with increasing the hybrid nanoparticle's percentage, whereas the wear rate decreased as the reinforcing materials was increased. Since nanoparticles restrict dislocation movement, the mechanical properties are enhanced.

      The high hardness was obtained for the composite (ZA-12/(3%BN+3%SiC)). With increasing the addition of nano (BN and SiC) particles to the zinc - aluminium matrix, it has been observed that wear rate values have steadily decreased.

The result has revealed that the compression strength improved in certain situations with an increasing weight percentage of the nano ceramic particulates. The highest increase that is in (ZA-12/ (3%BN + 3% SiC)) composite, and the least being in (ZA-12) alloy.